Westinghouse AC System, Руководство по установке

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Westinghouse Solar AC Installation Guide
Copyright © 2011 - Westinghouse Solar 15 | P a g e
F. Drafting the Electrical Line Diagram.
Figure 11 - Inverter components in a two row array
2. Single line diagram preparation
Prior to drafting the diagram it is necessary to identify the size and capacity of the existing
electrical system components. You will also need to research the additional equipment you may
need to include based on special local utility and building department requirements.
Electrical Site Survey List:
A. Main Panel bus rating
- This information can be found inside the electrical service door
on a sticker label, common residential bus ratings are 100A, 125A, and 200A.
B. Main Disconnect Rating- The main disconnect rating is printed directly on the main
breaker. It is common for the main breaker's rating to match that of the main panel
bus. The main breaker should not exceed the rating of the main panel.
C. Available breaker space- The most straightforward method to back feed a residential
grid-tied electrical service is by utilizing a double pole breaker to interconnect your
circuit (up to 15 panels) or circuits (if more than 15 panels) to the main panel. Survey
how many breaker spaces are available; a double pole breaker will require approx. two
inches of space in your average residential service panel.
D. Grounding- Check that a ground rod is present, serving as a grounding electrode to the
main electrical service. If you cannot identify a grounding electrode, per section 250 of
the NEC, a new one will need to be installed to assure a safe grounding path for your
solar equipment. The grounding electrode, new or existing needs to be included in your
electrical line Diagram.
E. Wiring Location- Is there a clear pathway through crawl spaces and attics to route your
Westinghouse Solar AC system conductors? Will the wire run be external to the
structure? How long is the wire run? This information will be a factor in sizing your