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    rickyajensen22@yahoo.com's Avatar
    [email protected] Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Mar 23, 2010, 06:05 PM
    Can I bunch SER cable, without deration? If so, what is the reference.
    I have already run 1/0 ser cable single phase wire for an apartment feeder to the sub panels. The inspector is telling me I cannot bunch them. I have run them down a hall and had to bunch them approx 18" to get into the panel room. He is saying I have to derate the wires. Is this true? If so it will cost much money.
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #2

    Mar 23, 2010, 07:04 PM

    When you say bunch do you mean bundle? If so then this only applies if it is over 24".
    The references are NEC: 338.10(B)(4) , 334.80 & 310.15(B)(2)(a)

    If this area is required to be fire stopped then the 24" rule does not apply.
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