Bundling

[scottam99]

What would the definition of bundling be in relation to MC cable? Here is the scenario-
Concrete plank construction hollow cells are approx 6" in diameter. If this was used as a chase for MC cable and seperate holes were drilled for each mc but they occupy the same cavity. Is this considered bundled?
What issues would arise if any? Derating?

 

[Dennis Alwon]

You can have up to 20 ccc for MC to be considered bundling-- art.310.15(B)(2)except.5. Now if you are looking for a definition of bundling, well- good luck.

 

[infinity]

What would the definition of bundling be in relation to MC cable? Here is the scenario-
Concrete plank construction hollow cells are approx 6" in diameter. If this was used as a chase for MC cable and seperate holes were drilled for each mc but they occupy the same cavity. Is this considered bundled?
What issues would arise if any? Derating?

IMO it's a judgement call for the AHJ. As Dennis stated the NEC will be no help with the definition of bundling.

 

[augie47]

IMO it's a judgement call for the AHJ. As Dennis stated the NEC will be no help with the definition of bundling.

Yep. They should clarify bundling like they have grounding and SE service ampacties

 

[construct]

Isn't bundling something you do with phone and internet service? :happyno: