IP Code

The IP Code, International Protection Marking, IEC standard 60529, sometimes interpreted as Ingress Protection Marking, classifies and rates the degree of protection provided against intrusion, dust, accidental contact, and water by mechanical casings and electrical enclosures.

The standard aims to provide users more detailed information than vague marketing terms such as waterproof. Two numbers indicate protection against solid bodies, first digit, and against liquids, second digit, in accordance with the charts below.

Ingress Protection Rating Guide

First Number | Effective Against

  • No protection (Sometimes X)
  • Protected against solid objects up to 50mm3
  • Protected against solid objects up to 12mm3
  • Protected against solid objects up to 2.5mm3
  • Protected against solid objects up to 1mm3
  • Protected against dust, limited ingress (no harmful deposit)
  • Totally protected against dust

Second Number | Effective Against

  • No protection (Sometimes X)
  • Protection against vertically falling drops of water (e.g. condensation)
  • Protection against direct sprays of water up to 15 degrees from vertical
  • Protection against direct sprays of water up to 60 degrees from vertical
  • Protection against water sprayed from all directions – limited ingress permitted
  • Protected against low pressure jets of water from all directions – limited ingress permitted
  • Protected against low pressure jets of water, limited ingress permitted (e.g. ship deck)
  • Protected against the effect of immersion between 15cm and 1m
  • Protected against long periods of immersion under pressure

Ingress Protection Rating Guide

Waytek Adds High-Demand GIGAVAC Rugged Environment Products to Its In-Stock Selection of OEM Electrical Components

Waytek, Inc., a leading distributor of electrical wiring supplies, connectors, and relays for electrical systems in the mobile equipment markets, is pleased to announce the addition of GIGAVAC rugged environment products to its broad, in-stock, offering of OEM electrical components.

GIGAVAC manufactures advanced switching solutions including high voltage relays, Waytek GIGAVAC press release imagecontactors, manual disconnect switches and other power products. Waytek customers can now order GIGAVAC’s most popular parts directly through Waytek.

GIGAVAC products are hermetically sealed—airtight and waterproof—so there is no corrosion. Parts are designed and manufactured for extreme environments (humidity, submersion, dust, high temperature, heavy shock and vibration). GIGAVAC construction allows for very long life cycles, and low warranty and service costs.

Waytek carries GIGAVAC’s most popular parts including a series of chassis mount contactors up to 600A, and 300A and 500A Battery Disconnects. Each heavy-duty contactor is ceramic to metal brazed, gas filled hermetically in a sealed chamber to protect key components, exceeds IP69K standards, and is temperature tested to 200 degrees Celsius.

“We have many customers that specialize in heavy-duty commercial, military, mining, agricultural and construction equipment. Being able to provide them with airtight and waterproof equipment allows Waytek customers to source from fewer suppliers,” said Jim Keister, marketing manager at Waytek, Inc.

About Waytek: Since 1970, Waytek has been providing electrical wiring supplies to OEMs in the truck body and trailer, construction machinery and equipment, mining, agricultural equipment, and emergency vehicle markets. Waytek maintains a large inventory of more than 10,000 different electrical supplies. Waytek prides itself on having the “Right Parts, In Stock, to be delivered On Time.” To view GIGAVAC products, visit the Waytek website at www.waytekwire.com

About GIGAVAC: Based in Santa Barbara, California, GIGAVAC manufactures and distributes Advanced Switching Solutions. GIGAVAC’s sealed switching devices include high voltage relays, contactors, manual disconnect switches and other Power Products. Used in a wide variety of applications, typical customers are manufacturers of commercial and military vehicles, as well as boats, light rail, mining, factory automation power systems, battery charging and management systems, fuel cells, solar and wind power systems, test equipment, HV power supplies, wafer fabrication, RF communications equipment, MRI/medical equipment and others in need of Advanced Switching Solutions. www.GIGAVAC.com.


Overcurrent: Eliminate the Hazards

When considering the generic application for circuit protection within the confines of appliance or equipment design, there are three significant categories of consideration.

They are:

1) Avoidance of hazardous conditions for operating personnel and others indirectly involved.

2) Any reduction in size of current-carrying conductors.

3) Isolating a faulted function—leaving the normally operating functions able to continue.

The safety issue is undoubtedly the most important of these three. The primary safety focus is to eliminate two types of hazards:

1) Electrical shock

2) Smoke and fire

The safety consideration manifests itself most often in the primary-input circuit protector. In this application, power enters the appliance and is immediately met by a protector that is ready to take the system off-line when required.

The matter of current reduction is really a traditional definition for circuit protection application. Anywhere there is a reduction in the size of a current-carrying medium; the potential exists for a fault to exceed the limits of that medium. For example, wire is designed to carry 20 amps, and is protected accordingly. If a branch circuit is taken from this 20-amp circuit utilizing wire (which, depending upon insulation, is rated to carry 3 amps), then a dangerous overload in the 3-amp circuit (say, 15 amps or a 500% overload) would not be noticed by the 20-amp circuit. (Figure 1)

Figure 1

Figure 1

The third issue involves the design of fault-tolerant equipment and relates to the case illustrated above involving distributed power through branch circuits (Figure 1). If the low-amp branch circuits are independent functions, a fault in one circuit should not take the whole system down. By inserting a circuit breaker in each of the branches, the fault is isolated to the least-affected circuit, leaving the others to function normally.

Types of Abnormal Conditions

In the discussion of circuit protection, it is convenient to separate fault conditions into two types. They are distinguished by virtue of their magnitude, but also by their cause-and effect relationship. The two are overload and short circuit. MP_Circuit Breaker Group

An overload is a condition where, for various reasons, the current level within an electric circuit exceeds its specified limits but continues along its designed path. An excellent example is a stalled motor. This situation, at least initially, exceeds the normally specified steady-state condition. Overload will occur at start-up, or if the rotation of the motor is impeded in some way.

This overload will generally be in the area of 300–700% of the rated current level of the device. Start-up conditions are allowed for within most circuit designs. Other extended overload conditions must be protected.

Short circuits, on the other hand, are conditions that occur when the current path to the load is bypassed with a very low or negligible resistance path. Under this condition, excessively high current flows, which represent a significant hazard both to the appliance and attendant personnel.

In general, an overload is defined by a magnitude of 200–800% of normal rating, and a short circuit is anything greater than this. Because of its limited impedance/resistance path, however, a short circuit is usually considerably higher than 1000% of normal rating. A short circuit involves circuit damage. An overload may or may not involve circuit damage and many times is easily eliminated without repair, even though sustained overloads result in short circuits over time if not protected.

Simplified Wiring

DiagramMultiplexing is a technique that can simplify your wiring. In traditional systems, the wires run from each switch to the device they power. In a multiplexed system, a module containing at least one microprocessor consolidates inputs and outputs for an area of the vehicle. With more and more devices in vehicles each year, multiplexing is necessary to keep the wiring from getting out of control.  In a multiplexed system, a module containing at least one microprocessor consolidates inputs and outputs for an area of the vehicle.

Output PDM

For instance, vehicles that have lots of controls on the door may have a driver’s-door module. Some vehicles have power-windows, power-mirrors, power-locks and even power-seat controls on the door. It would be impractical to run the thick bundle of wires that would come from a system like this out of the door. Instead, the driver’s-door module monitors all of the switches.

Here’s how it works: If the driver presses his window switch, the door module closes a relay that provides power to the window motor. If the driver presses the switch to adjust the passenger-side mirror, the driver’s door module sends a packet of data onto the communication bus of the car. This packet tells a different module to energize one of the power-mirror motors. In this way, most of the signals that leave the driver’s door are consolidated onto the two wires that form the communication bus.

Nice, Karim. “How Car Computers Work.” howstuffworks.com.

Copper Tumbles to Lowest in More Than 5 Years, Oil Rout Weighs

LONDON, Jan 12 (Reuters) – Copper prices slid to their lowest in more than five years on Monday as further weakness in oil kept commodity markets under pressure, investors worried about excess supplies and speculators kept up their selling.

Three-month copper on the London Metal Exchange (LME) dropped to a session low Wire of $5,966 a tonne, its weakest since October 2009, as sell orders kicked in at preset price levels, traders said.

Copper – which shed 14 percent in 2014 and is down nearly 5 percent already this year – closed 1 percent weaker at $6,015.50.

With market data showing an increase in bearish bets against copper, the metal was caught in a commodities downdraft spurred by oil, which dropped below $48 a barrel as Goldman Sachs slashed its short-term forecasts and Gulf producers showed no signs of cutting production.

“The weakness we are seeing is part of the ongoing deleveraging out of commodities. We have seen that in oil and also in the likes of iron ore and coal. It seems there is greater supply compared to demand and that is also the case for copper,” said Robin Bhar, an analyst at Societe Generale.

Bhar said he sees $5,500 a tonne as a bottoming-out level for copper.

Analysts polled in October had expected the copper market surplus to rise to 350,000 tonnes this year from a forecast 94,300 tonnes in 2014.

Copper traders had been eyeing two big put-option trades at $6,000 and $5,500 per tonne, which they fear could accelerate the market’s longest rout in years as prices sink to their lowest since 2010.

Hedge funds and money managers increased bearish bets in copper contracts during the week to Jan. 6, U.S. Commodity Futures Trading Commission (CFTC) data showed on Friday.

Aluminium closed down 0.4 percent at $1,810 a tonne.

“We note that reported inventories continue to fall, suggesting that World ex-China remains in deficit,” said metals strategist Michael Widmer at Bank of America Merrill Lynch.

LME aluminium stocks MALSTX-TOTAL fell 9,775 tonnes on Monday.

“We expect the aluminium market in World ex-China to remain undersupplied also in 2015, suggesting that prices will remain supported,” Widmer added in a note.

Zinc closed down 1.1 percent at $2,138 a tonne, lead gained 1.5 percent to $1,867, nickel ended down 2.6 percent at $15,100 a tonne and tin added 1.3 percent to $19,900.

Bahl, Harpreet. “Copper tumbles to lowest in more than 5 years, oil rout weighs.” Reuters.com. January 12, 2015

Current Copper Pricing

(click here to view our wire)

Everything You Need to Know About Tier 4 Final

New diesel engines will be cleaner than ever, the results of a decade long evolution in technology.

January 1, 2014, was a bellwether day for off-road diesel engines. On that date, the majority of diesel engines sold in the United States, Japan and most of Europe met the most strict exhaust emissions standards yet.

To meet those standards – called Tier 4 Final in the U.S. – manufacturers will outfit these engines with a variety of new exhaust aftertreatment components. The ramp up to this point has been gradual, with the Tier 3 standards phased in between 2006 and 2008, Tier 4 Interim from 2008 to 2012 and now Tier 4 Final.

You won’t have to deal with the full gamut of Tier 4 Final technology until you buy your next new piece of equipment or new engine. But eventually almost everybody will have some Tier 4 Final machines in their fleet. And many of you have at least some Tier 3 or Tier 4 Interim machines in your fleet now. There are even some engines out currently that meet Tier 4 Final requirements.

The reduction in emissions from diesel engines as a result of this technology has been nothing short of astounding. But it is mandated by the EPA, and it doesn’t come cheap. By some estimates, the new engines have boosted machine prices by as much as 10 percent.

Here’s a short review to help you sort out all the details:


The EPA regulations aimed to drastically reduce two primary exhaust pollutants. Particulate matter, or PM, is mostly unburned hydrocarbons like soot that previously shot out the exhaust stack unimpeded, and nitrates of oxygen or NOx, which is a primary ingredient of smog.


With the advent of Tier 3 regulations, most manufacturers added an exhaust gas recirculation – or EGR – circuit to their engines. EGR takes a portion of the exhaust gas and recirculates it with fresh intake air. The exhaust air reduces the amount of oxygen in the combustion chamber. When this oxygen-reduced air ignites on the compression stroke, the resulting exhaust contains less NOx. Tier4Side1The EGR circuit is a simple fix. There is an EGR valve, controlled by the engine’s electronic control module, but otherwise it’s simple plumbing. Recirculating hot exhaust gas back into the engine increases temperatures. So most EGR engines run the recirculated exhaust gas through a cooler. Some manufacturers also increased their engines’ overall cooling system sizes as well.


To bring down PM to acceptable levels in high horsepower Tier 3 engines most manufacturers resorted to using a diesel particulate filter, or DPF. These large, honeycombed, ceramic filters are coated with precious metal catalysts that trap PM in the exhaust stream.

In normal operating conditions, the exhaust temps are hot enough to incinerate most of the trapped PM in a DOC. But idling, cold starts and light load factors can accelerate PM accumulation. When a DPF becomes full enough to affect backpressure, the engine’s ECM injects a stream of diesel fuel into the DPF, raising temperatures and burning off the accumulated PM. This is called regeneration.

On some systems regeneration happens automatically without the operator needing to do anything. On others, a warning light comes on to let the operator know that he needs to activate the regeneration system. Regeneration temporarily raises the exhaust temperatures, making it important not to engage in a regeneration cycle when you’re around combustible material.

Eventually ash, which won’t burn off, collects in the DPF, requiring it to be cleaned or exchanged. The EPA requires manufacturers to size DPFs on engines 175 horsepower and up to last at least 4,500 hours between cleanings. For engines below 175 horsepower, the required maintenance interval was set at 3,000 hours.

Most heavy equipment manufacturers today offer guaranteed intervals on DPF replacement or cleaning. To prevent excessive ash buildup and possibly voiding your warranty, use a low-ash oil. These are typically designated with an American Petroleum Institute’s CJ-4 label.

Be mindful that DPFs are so good at scrubbing soot from your exhaust that they can take away the visible smoke that used to tell you of impending engine problems. DPFs can also be compromised by over extended drain intervals, faulty fuel injectors or cooling system problems so it’s important to keep the entire engine well tuned and in top shape.


Another way manufacturers are reducing exhaust pollutants is the used of diesel oxidation catalysts. These are filters with a catalytic coating on the filter media. Much like the catalytic converter in a car, the catalyst on a DOC chemically changes carbon monoxide, hydrocarbons, diesel particulates and other pollutants to carbon dioxide and water.

In some engines a DOC is used in conjunction with a DPF. In many lower horsepower engines a DOC is sufficient to meet Tier 4 Final regulations without the need for a DPF. These are often touted as “maintenance free” since most stand-alone DOCs do not need cleaning or replacement and are warranted for the life of an engine.


Tier 4 Final regulations called for a drastic cut in NOx levels. In most engines this was more than EGR alone could handle. The solution was to install a new exhaust after treatment system called selective catalytic reduction, or SCR.

In an SCR system, the exhaust passes through a DPF or DPF/DOC combination first and is then doused with a mist of water and urea (a common chemical used in commercial fertilizers) in a catalytic chamber. The urea/water solution is commonly referred to as diesel exhaust fluid, or DEF. The exhaust and DEF in the presence of the catalyst turns the NOx into mostly water and nitrogen.

Since 2010, on-road trucks have used SCR to reduce NOx, so the technology is well proven. It does add another layer of complexity, but there are several advantages. For one, the use of SCR means the engine can meet emissions standards with a less aggressive use of EGR – so these engines run cooler.

The disadvantages of SCR are that you have to keep DEF in stock and refuel the DEF tanks on your equipment. If you run out of DEF, the engines are programmed to derate, eventually to the point where you can no longer operate. Running out of DEF is just as disruptive to your operations as running out of diesel.

DEF consumption ranges from 3 to 6 percent of your diesel fuel consumption. But since DEF is priced at or lower than diesel fuel and since it actually helps improve fuel economy, most view the pricing issue as a wash.


Ultra low sulfur diesel was introduced into the marketplace in 2009 and 2010. The sulfur levels were reduced because the catalysts used in DOCs and SCR could not handle the higher levels of sulfur.

As an equipment owner or manager, you don’t have to worry about mis-fueling your machines, at least in the United States and Canada. Today ULSD is the only type of diesel you can buy. But the fact that the newer engines can only burn this specific type of diesel may affect the resale value of these machines in the future.

Most auction companies say up to half of the machines they sell wind up going overseas, many to Latin America. In these countries, and most of the rest of the developing world, ULSD is not yet available. So some are predicting a glut of Tier 4 Interim and Final machines in the market in the future, which could depress prices for emissions-compliant used equipment.

Most manufacturers are working on a “de-tiering” solution, a modification that would allow these machines to operate using the higher sulfur fuel. But this process is still in the early stages and the details of how this will be accomplished differ between manufacturers.

If you’re a fleet manager with a big fleet and a regular turnover schedule, talk to your OEM or equipment dealer about their de-tiering solutions before determining the equipment’s residual value.


As the technology of diesel engines has progressed from Tier 3 to Tier 4 Final other aspects of the engines have been tweaked as well. To provide better fuel combustion and throttle response manufacturers have fine tuned the fuel-air mixtures with a variety of turbocharger designs such as twin turbochargers (a large and a small one) and variable geometry turbochargers. Fuel systems have largely gone to a high pressure, common rail design with pressures as high as 30,000 psi or more. And electronic engine control modules have allowed for ultra-high speed, ultra-precise fuel injection sequences.

The bottom line is that new diesel engines are cleaner than ever before, and in many cases more fuel efficient, too. But along with this comes the need to properly price these more expensive engines and any additional maintenance into your equipment owning and operating costs and to make sure any new maintenance protocols are in order to avoid surprises and maximize uptime.

Jackson, Tom. “Everything You Need to Know About Tier 4 Final.” Equipment World. 10/01/2013

Waytek Introduces New Line of Power Distribution Modules for CAN-BUS Focused Manufacturers

Waytek_InfinityWaytek, a leading distributor of electrical wiring supplies, connectors, and relays, for the mobile equipment industry is proud to announce the addition of Infinitybox, to its broad, in-stock offering of OEM manufacturing electrical components.

Staying ahead of the demand, Waytek added the premier manufacturer of CAN-BUS for power management and mobile equipment products, Infinitybox, to its product line. This progressive line of power distribution modules (PDMs) complements the Waytek line by offering exciting new technology that’s easier to program, install and use.

The Infinitybox J1939 POWERCELL PDM is designed for the commercial vehicle. It provides 10 outputs per each POWERCELL, solid-state MOSFET outputs, internal fuses for harness protection, standard automotive connectors for simple harnessing, and up to six POWERCELLs on one Infinity J1939 network. A variety of connection kits are also available.

They provide a customizable, modular power distribution platform that can be added to existing CAN-based wiring harnesses or they can replace traditional wired relay panels.

The Infinitybox inMOTION Motor Controller includes 5 H-bridge relay pairs for polarity reversing, internal current sensors for monitoring output load, integrated fuses for harness protection, standard automotive connectors for simple harnessing, and output configuration set by CAN messages sent from the Infinity J1939 input device.

Infinitybox J1939 PDMs are targeted toward the commercial vehicle manufacturer market. They provide a customizable, modular power distribution platform that can be added to existing CAN-based wiring harnesses or they can replace traditional wired relay panels.

The Infinitybox product line offers easy integration into existing Infinitybox J1939 networks, labor savings compared to building customer relay panels, and flexible solutions allow vehicle customization on production line. The Infinitybox J1939 PDM offers integrated output LEDs for status and diagnostics, and are field configurable and addressable.

The off-the-shelf system is completely customizable. Customers add the Infinitybox hardware necessary for the complexity of their vehicle. The behavior of the PDMs can be controlled by configuring the software on your J1939 input device. This flexibility allows changes to be made before, during and after installation; providing unprecedented control over your vehicles electrical system.

A wide range of Infinitybox products are kept in stock at Waytek. The Company offers customers a simple migration path from traditional switches and relays to Infinitybox J1939 switches and power distribution modules.

Infinitybox PDMs provide a complete electrical management solution for low-volume prototypes or high-volume, serial production. Its multiplexed architecture streamlines and has the capability to integrate functions of external electronics modules including timers, delays, dimmers, alarms and other control systems. It also features a built-in Infinitybox J1939 gateway that allows integration to other systems in the vehicle.

Originally designed for harsh-duty and off-highway equipment, Infinitybox products have crossed over to a broad range of commercial, emergency vehicle and motorsports applications. These power systems have been designed and tested to thrive in the harshest off-highway applications.

Infinitybox products are designed to provide vehicle manufacturers with the right tools to quickly engineer custom solutions for their power distribution systems.

About Waytek: Since 1970, Waytek has been providing electrical wiring supplies to OEMs in the truck body & trailer, construction machinery & equipment, agricultural equipment, and emergency vehicle markets. Waytek maintains a large inventory of more than 10,000 different electrical supplies. Waytek prides itself on having the “Right Parts, In Stock, and delivered On Time.” To view Infinitybox products in Waytek’s product line, go to www.waytekwire.com.

About Infinitybox LLC: The Infinitybox team brings decades of power distribution, circuit protection and electrical architecture design experience to our customers. In addition to providing off-the-shelf electrical distribution building blocks, our team can engineer custom solutions for your unique application. These modular systems allow vehicle manufacturers of any size to quickly engineer their power distribution system using these standard PDM building blocks.

Product Spotlight: Blue Sea Systems m-Series Battery Switch

Many people associate “heavy-duty” with size. But heavy duty doesn’t always mean heavy weight. Waytek stocks the Blue Sea Systems m-series battery switch in a “mini” compact size, with heavy-duty current capacity and harsh environment specifications.

The m-Series Battery Switch from Blue Sea Systems is a great choice for on-road, off-road and boating equipment. Its “mini” size, flexible mounting options, and current-carrying capacity make this battery switch versatile to meet just about any battery switch application for small and medium-size vehicles and equipment. It is very compact, measuring less than 3″ by 3″ (7.6cm X 7.6cm), making it ideal for installations where there are size and space constraints. In spite of its size, its current-carrying capacity exceeds many standard-size switches.

The Blue Sea Systems m-Series Battery Switch is available at Waytek in three models:

The latest innovation in battery switches, Blue Sea Systems’ Dual Circuit Plus™ Battery Switches provide Engine and Start circuit isolation. Dual Circuit Plus™ Battery Switches turn the House and Start batteries on at the same time, but isolates them from each other. Battery isolation protects the Start battery from being discharged from House loads like refrigerators, stereos, and lights, preserving it for starting the engine. Battery isolation also protects sensitive electronics from voltage spikes and sags that may occur during engine starting. In addition, when coupled with an automatic charging relay (ACR) or battery isolator, both battery banks are automatically charged.

Current and Voltage Ratings

The mini size of Blue Sea Systems m-Series battery switches is deceiving. These switches are capable of 300 Amperes continuous rating and 500/450 Amperes intermittent rating. The Single Circuit and Selector models are rated at 48V; the Dual Circuit Plus™ is rated at 32 V. Furthermore, the Dual Circuit Plus™ model is rated at 300 Amperes per circuit so that they have a total current-carrying capacity of 600 Amperes. And, because these switches are UL Listed, you can be confident that they safely handle these high amperages. (See: Technical Brief: UL Marine Listed, Battery Switch Testing)

Case Material

The m-Series Battery Switch case is manufactured using two glass-reinforced plastic variations with properties specific to their application in the switch:

  • The front case, knob, snap-on rear cover plate, and removable isolator covers are made from glass-reinforced polycarbonate, a highly impact resistant material.
  • The switch back plate to which the terminal studs are connected is polybutylene terephthalate (PBT) polymer. PBT is a high heat-rating material not affected by the heat that can be generated by the terminals when operating with high current.

Terminal Stud and Electrical Contact Material

The m-Series battery switch is manufactured with copper contacts and tin-plated copper terminal studs. The bare copper contacts provide the best conductivity and therefore the least amount of heating. The 3/8″ (M10) tin-plated copper studs provide maximum conductivity and corrosion resistance. The 7/8″ (22.2mm) long stud length accepts multiple-cable terminals.

On the Dual Circuit™ and Selector models, the terminal studs are cold pressed into the copper contacts; On the Single Circuit model, the heads of the studs serve as the electrical contacts. Both techniques provide a very strong mechanical and ideal electrical connection. This technique is better than using a nut to fasten the stud to the bus or backplate-a practice used by most battery switches on the market today. A nut may loosen with vibration or during installation of battery cables. When the one-piece stud is pressed into place, it remains tightly fastened thereby eliminating the risk of overheating and switch failure.

Mounting Options

The m-Series battery switch can be mounted in any one of three convenient ways to meet just about any installation need:

  • Surface mounting

  • Front panel, through hole mounting, this option is self-trimming, for up to 3/4″ (19mm) panel thickness

  • Rear-panel, through-hole mounting, for up to 1/8″ (3.175mm) panel thickness

  • Rear case installed

The rear cover plate can be attached in all of the mounting configurations. The removable rear cover plate and side isolator covers protect terminal studs. Remove only the side isolator cover required for you to make connections.

The knob can be removed when the switch is in the off position to provide lockout for servicing. This prevents power from being turned on while the electrical system is being serviced. The knob is positively retained in other positions.

Additional Features

In addition to its compact size, multiple models, and current-carrying capacity, the m-Series Battery Switch also has additional features that make it a desirable choice for many boating needs:

  • Ignition protected-Safe for installation in on-road and off-road vehicles and equipment
  • Accepts up to 4/0 AWG battery cables

Learn More about Blue Sea Systems and m-Series Battery Switches.


Minneapolis, MN, July 2014, - Waytek, Inc., a leading distributor of electrical wiring supplies, connectors, and relays for the mobile equipment market, is pleased to announce the addition of Blue Sea Systems products to its broad, in-stock offering of Original Equipment Manufacturer (OEM) electrical components.

Blue Sea Systems designs and manufactures AC and DC electrical system equipment engineered to withstand the demanding applications in marine and specialty emergency vehicles, industrial machinery, construction machinery, and agricultural equipment markets. Blue Sea System is an industry leader with a reputation for quality.

“More than 75 percent of Blue Sea Systems products are hand assembled in Bellingham, Wash. and backed with a satisfaction guarantee,” said Jim Keister, marketing manager at Waytek, Inc. “Blue Sea Systems stand behind their products because they’re built to last; they stand behind them for as long as you own them.”

OEM customers and retailers can purchase Blue Sea System’s products on the Waytek website. Bulk pricing is available for large order OEM customers. For retail customers, retail packaging is available and designed to be hung in-store on J-hooks for the most efficient use of space. The Waytek website conveniently provides all the mechanical information and specifications necessary to help customers make an appropriate, informed purchase.

The Waytek website features a broad selection of Blue Sea System’s most popular products. Photos, technical and data sheets, and application guides accompany detailed product descriptions. Waytek also has knowledgeable customer service representatives available to answer product questions at 800-328-2724.
Blue Sea

About Waytek

Since 1970, Waytek has been providing electrical wiring supplies to OEMs in the truck body and trailer, construction machinery and equipment, agricultural equipment, and emergency vehicle markets. Waytek maintains a large inventory of more than 10,000 different electrical supplies. Waytek prides itself on having the “Right Parts, In Stock, to be delivered On Time.” To view the Blue Sea System’s products, visit the Waytek website at www.waytekwire.com

About Blue Sea Systems

Blue Sea Systems was founded in 1992 based on a commitment to create innovative, high-quality marine electrical products to improve the safety, simplicity and reliability of boating. Blue Sea Systems employees are active boaters who apply their passion to designing, developing and building products that enhance the experience of boaters. For specific product information and to learn more about Blue Sea Systems, visit www.bluesea.com.

How to Choose the Right Time Delay Relay


Time delay relays are designed to control an event based on time. Work trucks, buses, emergency vehicles and other mobile equipment require delayed circuit operation for several applications. The solid state design of time delay relays withstands the electrical environments typically found in on and off-road vehicles and equipment. The key is selecting the right time delay relay for your application.

When designing circuits using time delay relays, you should consider the following questions:

  1. What initiates a time delay relay?
  2. Does the timing start with the application or release of voltage?
  3. When is the output relay energized?

Three industry standard time delay relay functions are available: On-Delay, Off-Delay and One-Shot.

On-delay timer relays are used when one circuit function must activate a time delay after another function. For example, you want to start an air compressor five seconds after the PTO is activated. The circuit that activates the PTO would be connected to the on-delay timer relay’s timer input. The timer’s output would operate the compressor’s start circuit. When the PTO is activated the timer starts. Five seconds later the timer’s output would start the compressor, and would stay on until the timer’s input is removed.

Off-delay timer relays are used when one function must start a second function and the second function must stay on for a time period after the first function is deactivated. For example, a school bus has an egress light that must be started when the door is opened, and must stay on for 10 seconds after the door closes. The door open switch is connected the off-delay timer relay’s timer input and the egress light is connected the timer’s output. When the door is opened the timer’s output is activated, turning on the light. When the door switch indicates the door is closed the timer starts. After 10 seconds the timer’s output is deactivated, turning off the light.

One-shot timer relays are used when one function must start a second function and the second function must stay on for a fixed time period. For example, a rear view mirror heater must only operate for 15 minutes to prevent damage to the mirror. The mirror heater switch is connected to the one-shot timer’s input and the timer’s output operates the mirror heater. When the switch is turned on the timer starts and its output is activated, turning on the mirror heater. After 15 minutes the timer’s output turns off regardless of if the switch is on or off.

For more information on time delay relays, call 800.328.2724.

Learn More about time delay relays.

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