PV combiner box protection [RE-wrenches]

[William Korthof]

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>Ray:
>
>Speaking of not affording, can you afford

I would also like to see more code-compliance, and fewer "3rd world"
conditions, but I don't believe conformance the NEC or any other code
will totally *assure* safety; nor do sub-NEC conditions *necessarily*
guarantee a hazard. Illustrations:

We know what happened with aluminum wiring for branch circuits.

I've personally seen and replaced a few Zinsco 100A circuit breakers
which, when "heavily loaded" to a 50A blew up after a few minutes.

Federal pacific circuit breakers were stamped by UL and code kosher
for decades, yet the blatant product deficiencies (failure to trip on
overload, inadequate bus/breaker interface...) have caused many fires.

Ever notice that the service entrance wires from utility companies are
vastly smaller than the NEC-sized wires on the customer's wiring?
A 200A service may get AL #6 AWG drop from the utility, but use
CU 2/0 down the service mast.

Consider two 1.2kw electric heaters plugged into one #16 or #18
AWG lamp extension cord on a 20A circuit breaker.

And what happens to the chassis of most electric stoves and
dryers when there is any fault in the neutral connection?

I'll stop...

/wk

>to lose your business in a lawsuit?  Can you afford to lose sleep worrying 
>about the job that may result in a house fire?
>
>Rather than resist doing the job right, maybe you should be looking for 
>clients that you can install and not worry about
>burning their houses down.  I have people ask me to do a shoddy job once 
>in a while and I have one answer:  it's either
>right or its unsafe, and I don't install unsafe systems.
>
>I can't afford to lose my business, and I need all the sleep I can get!
>
>William Miller

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