Yes, the power packs' low voltage wiring is suitable for use in Plenum ceilings. Install power packs in approved electrical enclosures. Install in accordance with state, local and national electrical codes. Yes! The NEC has stated that Class 1 and Class 2 wires can occupy the same enclosure as long as the rating of the wires equal or exceed the maximum circuit rating. The power pack wiring is rated 600V for the Class one wires and 300V for the Class two wires. See NEC section 300-3(c).

According to the National Electric Code (NEC) a plenum is a "compartment or chamber to which one or more air ducts are connected and [which] forms part of the air distribution system." In other words, the open space above your ceiling extends above other rooms in the same building or is open to ducts that connect it to other parts of the building. In a plenum ceiling air can circulate through the air ducts to the whole building.

A wall switch is not required for the sensor to operate correctly. However, for installations where the sensor may need to be temporarily overridden, a wall switch is needed.

The quantity of power packs depends on the number of circuits to be controlled in the application. Contact our technical assistance line at 1-800-879-8585 or TWS_support@wattstopper.com for specifics.

You most certainly can have plenum installed if you wish. The NEC does not require it though, so the decision is really up to you. Just remember that Plenum is more costly to install than PVC.

Yes, the WS and WI switches are dual voltage. The WA and TS wall switches are universal voltage, rated 100 - 300 VAC, 50/60 HZ. The WD dimming wall switch sensor is voltage specific.

Yes, they are compatible with all electronic ballasts and incandescent loads. Our switches feature Zero Crossing Circuitry and no leakage to load. This prevents any inrush problems from electronic ballasts that may be experienced with other switches.

Yes! There are versions of outdoor sensors that offer an additional isolated relay along with the normal line voltage relay. The isolated relay can be used to control low voltage loads. See The Watt Stopper wiring diagram #57-151. Yes, the EW Low Voltage Outdoor Motion Sensor. It has the same features as the line voltage sensors, but with low voltage operation. Yes. The time delay you set on the sensor will determine how long lights will remain on after the space is unoccupied.

Plenum cable has a metal sheath inside that meets required wiring code for permanent installation. If you were to make a projector a permanent part of a conference room, for example, you would choose cable with plenum. Non-plenum cable is suitable for temporary installations.

The Watt-Minder is designed for use in dry areas and is not made to be used in damp or wet areas that may be present outside. While the Watt-Minder can be used to measure external appliances such as holiday lights or outdoor landscaping lights or pumps, care should be taken to insure the appliance and the Watt-Minder does not come in contact with any damp or wet conditions. The Watt-Minder is designed for operating in the temperature range between 10C and 35C (50' F to 95' F).

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Yes, you can. To figure out which lamps you can use for any instrument, call our Counter Staff and tell them what kind of base your lamp has (use diagrams at left) and what the rating for your particular instrument is. Any lamp with the same base, bulb and MOL as your 750 watt lamp will fit your instrument and the rating will determine what wattage you can use.

A WATT is the unit for measuring electrical power, i.e., the rate of doing work, in moving electrons by, or against, an electrical potential. Formula: Watts = Amperes x Volts.(Return to Top)

Good question. The answer can be different depending on which manufacturer you ask. Technically, a Watt is the unit of power that was created by James Watt, the inventor of the Steam Engine, over 200 years ago. It is equal to 1 / 765 of a horsepower. This can be converted to electrical power using some intense math that we can skip for now. But you can get an idea about it if you consider a washing machine with a ? horsepower motor. It will take about 380 Watts of electricity to drive it.

It's important to understand energy use in lamps when you choose from today's full array of lighting technologies. The amount of light given off is measured in lumens. One lumen is the equivalent of the light given off by one candle. A watt, on the other hand, is the amount of electricity a light bulb uses to produce light - it's not an indication of brightness.

Although they have not been known to cause harm, it is best to consult your physician prior to using the heat packs.

Yes, extension cords will not affect the operation of the Watt-Minder. Be sure and use an extension cord that is appropriate for the appliance being measured (grounded cords for ground appliances, and make sure the cord is heavy enough for the appliance being measured)

Check with the lamp manufacturer's specifications to see if the lamps are rated for dimming use; many are not. We don't recommend using these reduced wattage lamps as the Axis Ballast tuning feature allows you to adjust the lamp output to your specific need or preference. The standard 32 watt Super T8 (high lumen) lamps are priced less than the reduced wattage lamps, readily available, highly reliable, and offer more lamp options. No.