Replies

1. 
   Guest_ | Mar 06, 2000 07:19pm | #1

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   It's probably a good idea to test a new installation. Truth is, I've never heard of anyone doing it. The test is usually just turning on the main breaker and flipping a couple of lights to see if they work. And, I usually hang around for a few minutes and keep my nose checking for fires. Haven't had one yet!

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   Guest_ | Mar 06, 2000 09:37pm | #2

   *1. Always test every light fixture and plug after installation. I use either a tester, and switch the leads to insure that the neutral and ground are hooked up correctly. One easy method is the yellow plug type testers that light up if the outlet is properly wired. Very easy to use.2. My subs ususually switch all breakers, and note any "soft" ones. Funny, if a breaker has tripped, they will sometimes go "soft" and be extra sensative. I don't know why that happens but it does. I check those out and replace those soft ones. 3. I have my subs label the breakers with typewritten labels or with label maker. It's a really nice touch that the homeowners like. Check them out to see if they are properly labeled.There was a thread about a year ago with an electrican espousing a whole testing program, which was fairly complete, but out of line for our subs here. Our building inspections are so complete that box density, strapping, and nail plates are closely monitored. Gee our inspectors are so tough that they like to see about 1/32nd of an inch of bare wire showing on the outside of the bus bar. This way they know that the circuit is tight, and that an insulated wire has not been clamped into the box. If they see that, they won't test, but if not, they will go through the box and spot check the circuits.

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   CAP_ | Mar 07, 2000 06:15am | #3

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   Dave,

   Most residential work is "tested" just like Ryan sez--turn all lights, fart fans, etc on and let 'em run all day while you're there. And use a three-light tester to see if the H/N/grnd are tied in right to the outlets. And test every GFI by hitting the test button.

   If you really want to evaluate the quality of the splices, the resistance has to be checked. Power off, take a DMM and a long test lead...

   To see what the voltage drop is, you need to test under a load--ideally close to the ampacity of the circuit. Use a DMM to check V at the far end of the circuit, without and with a big space heater plugged in.

   Or, if you have $$$ to spend, get a "Sure-Test", by Commercial Industrial Electronics, Inc, of NY. They've got a good web site. It automatically measures voltage drop at 15A or 20A, also checks the trip current of GFIs, and does a bunch of other stuff. Electricians mostly use it for troubleshooting commercial systems. It's worth it for that. And it comes in real handy in evaluating old residential.

   wiring.

3. 
   Dave_Berger | Mar 07, 2000 06:15am | #4

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   I'm wrapping up the finish wiring in my cottage and would like to get opinions on the best way to test the quality of the connections, etc. Am I best to use a voltage drop test or a resistance test?

   TIA