Westinghouse AC System, Руководство по установке

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Westinghouse Solar AC Installation Guide
Copyright © 2011 - Westinghouse Solar 30 | P a g e
splices in the east-west direction and contiguously with the north-south direction using grounding
washers on specific North/South Brackets such that each module is electrically grounded one in a
continuous path to the grounding electrode for the array.
Figure 19 - Ground washers on the North/South Bracket ensure ground continuity across rows
Each contiguous array of module frames is then attached to the grounding electrode, in accordance
with Section 690 of the National Electrical Code (NEC) using one method as follows. Ensure positive
electrical contact through the anodizing on the module's frame by attaching the grounding
conductor to one of the 0.173” diameter (4.4 mm) holes on the frame marked ‘ground’ using an a
ILSCO GBL-4DB lug, star-washer and thread-rolling 10-32 X ½” Taptite II stainless steel screw and
torque to a value of 20 Lbf-inch. Attach a solid copper (gauge AWG 4-12) to the lug to enable array
grounding.
Figure 20 - Ground conductor applied to enable array grounding
7. Adding AC Interconnect Parts
The Interconnection cable is connected to the last inverter in a Branch Circuit . Branch circuits
must never exceed a total quantity of 15 inverters at 240VAC. Wiring patterns and direction are
planned out before the array is installed so that the final destination of the built-in wire harness
and AC interconnection cable is in proximity to the junction box. The junction box is the location
where conductors from the array transition to conductors that will run down to the main