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It's a table that shows the ampacity ratings for the particular wire size and insulation you are using. Example: #12 THHN CU is rated @ 30amps under the 90 degree column. (#12)is the wire size, (THHN)is the type of insulation on the wire (CU)is copper. You shouldn't be using the chart unless you're a qualified electrician simply because there are many sub rules and exceptions.
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Earn +20 ptsQ: What is the table 310.16 of the NEC?
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What is the summary content of NEC 690?
nec 690
Is it NEC code to have a water fountain on a GFCI protection?
Yes. NEC 2005 440.21
What size copper bonding jumper is required by NEC - OR 2011 to bond the gas pipe to a 120v 20A circuit?
I don't know what the NEC - OR 2011 is. Is that a code book for the state of Oregon? The NEC does not allow using a gas pipe as a grounding electrode. You run the risk of heating the gas to explosive temperatures.
When did NEC require 3 wire circuits in a home?
1960
Why are the black and white wires hot?
It is because the nec standard.
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