outdoor lighting question


  #1  
Old 11-16-03, 04:47 PM
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Question outdoor lighting question

ok -
a couple more questions.

1) I have a couple of outdoor lights that are wall mounted.
two have nice new outdoor metal j-boxes that the lights
attach to. one is the front door light, which is old, and has
no j-box, wires just hide behind the light's plate.

my questions are: a) can these use NM-B cable, or do they
need special "outdoor" cable and if so, what kind do they
need? b) does the front door light need a j-box?

2) I have an extra ground wire that runs from the ground bus
on the panel to the water pipe at the meter. I need to relocate
this wire, because it runs through a bad location (don't ask,
just a weird renovation.) Can I attach this to a nearby
cold water pipe and then put a jumper around the water meter,
or do I have to run it all the way back to the meter?

thanks!
 
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Old 11-16-03, 06:02 PM
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Your wiring to outdoor lights that are attached to the house may use regular Romex, NM-B cable. All fixtures should have a junction box. It is possible that certain lights may have their own integrated junction box.

The extra ground wire you speak of to the cold water pipe is not extra. It is required by code. Depending on the age of the electrical installation in the house it may be the only elctrical connection to earth ground. Today there need to be at least two connections to ground, but that has not always been the case. Even if you have two other connections to earth ground you still need to have this connection to the water pipes.

You cannot relocate the connection to the cold water pipe. This connection needs to be made within five feet of the pipe entering the residence. The closer to the actual entrance the better. There should already be a jumper around the water meter. If there is no jumper around the water meter then you should install one. You can run the wire any way you wish in your residence (within reason and within code) but you should keep it as short as possible.
 
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Old 11-16-03, 10:20 PM
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sounds good. I'll just break down and buy more ground
wire not a big deal. at least now I understand it =)

good to hear that I can use the regular NM-B, didn't want
to have to pull those circuits out and redo.

thanks!
 
 

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