INSTALLATION GUIDELINES FOR ELECTRICIANS

Date: December 2001

The NPS 1000 and NPS 660 Power Modules provide low voltage direct current (DC) output (53.2VDC) in support of lighting fixtures.

Mount power modules vertically in a well ventilated vertical position near the fixtures being served.

Power Modules must be installed at the location of the fixtures (up to 16, two-lamp fixtures) to minimize voltage drops in the connected cabling.

Carefully lay out cabling from the power modules to the fixtures using the shortest possible lengths.

Use two or more separate service cables from the power module junction metal box to a given string of fixtures to avoid voltage drops.

Use the largest cable size consistent with load amps and cable length to minimize voltage drops.

Use low voltage, low current remote "relay" power switching in-line with the loads to avoid voltage drops in the switch "legs". OR
Use the included RJ11, phone type connection included with the Nextek ballasts. (Refer to diagram and literature.)

If connecting to solar collector the total solar collector array for the building must be electrically divided into sub-arrays or sections with each sub-array output not to exceed 18 amps at full sun intensity at the PV input connection of the NPS 1000.

If the optional battery is not used in the system, a 2900 microfarad, 75 volt, electrolytic capacitor (Nextek part: NA 2900) must be installed across the battery connections (brown and orange wires) of the power module. Observe capacitor polarity

If connected to batteries, locate the batteries as close to the power unit as possible with a wire size no smaller than AWG 10.

IMPORTANT: Carefully observe polarity.
WARNING: Do not install on combustible surface.

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