Silver Wiring - what is it?

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Old 12-20-09, 02:49 PM
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Silver Wiring - what is it?

I have been replacing a few light fixtures (flush mount fixtures and pendant style) and noticed that most of them have silver wires in the fixture. I cannot find any labeling that says what the wire is made of. The fixtures are brand new. The wiring is made of stranded small silver wires. Is it alumumin? Do I need special connectors to connect it to my copper house wiring?

My concern is that everything I read says that aluminum wiring is unsafe to connect to copper.

This brings a similar question about wire nuts. I noticed some of them are silver on the inside, while others are copper. Are the silver ones for a special purpose? I have seen the same colored nuts (yellow), some with silver and others with copper inside.

Thanks.
 
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Old 12-20-09, 03:45 PM
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They are copper wires that have been tinned. Tinning is the process of coating wire with solder.
 
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Old 12-20-09, 04:42 PM
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You will need to make sure that you are not installing fixtures that require 90 degree rated insulation if you wiring method has a lesser rated insulation.

In the US the rating is designated NM-B for the 90 degree rating. It was first made around 1984. Older Nm only had 60 degree rated insulation. I don't know if Canada had a similar change.
 
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Old 12-21-09, 05:24 AM
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Wires

Do the silver wires have insulation?
 
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Old 12-22-09, 06:22 PM
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FWIW, Canada changed from NMD-7 wiring to NMD-90 wiring, which is similar to US NM-B, but has no paper in it. I know we had it at least since 1990.
 
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Old 01-10-10, 08:51 AM
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Thanks everyone for your replies. I was busy over the holidays, and just read through the posts now.

The fixtures are brand new and from a major hardware store, so I'm not concerned. After reading a few sources, it appears it is (as you mentioned) tinned copper wire.

Thanks again.
 
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