When running Romex wire homeruns to a panel, I usually bundle 8 to a stack it and space the stack its two feet apart. I feel this provides a neat work like manner appearance. The stack its wire holders hold two Romex?s per slot, total of 8 wires in a bundle. Is this procedure the proper way of running cables with out worrying about derating of cables??? Or should this be avoided. The code 310.15 exception #5 says that if not more than 20 carrying conductors are bundled derating shall not apply. Is this true? Please help.
Condutor Bundling
- Thread starter Matty
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- Windsor, CO NEC: 2017
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- Service Manager
Exception 5 only applies to MC cables - but it is useful in determining a definition for "bundling", since up to now none has been given.
If you look closely at the packaging of most Stack-It style products, they mention that derating may be required. Generally, I believe most AHJ's consider them to not be bundled, however I believe technically they are, even if you were to spread them to 4.5' apart. It's the cables running together that matters, not the frequency of support.
If you look closely at the packaging of most Stack-It style products, they mention that derating may be required. Generally, I believe most AHJ's consider them to not be bundled, however I believe technically they are, even if you were to spread them to 4.5' apart. It's the cables running together that matters, not the frequency of support.
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