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Electrical Inspections Contains discussions about electrical systems. This includes receptacles, panels, wiring, etc.

 
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  #1  
Old 2/29/08, 11:14 PM
Jack L. Gilleland's Avatar
Jack L. Gilleland Jack L. Gilleland is offline
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Default How many hots?

Need to know how many hots are permitted in one pipe?
Commercial job.

Thanks in advanced.



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  #2  
Old 2/29/08, 11:16 PM
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Default Re: How many hots?

Quote:
Originally Posted by jgilleland
Need to know how many hots are permitted in one pipe?
Commercial job.
Usually no more than necessary.

Seriously, bro, what gauge, what was the overcurrent ampacity, and what was the size and type of pipe? The number can be from 6 to 1,000, depending on a number of factors.
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Old 2/29/08, 11:22 PM
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Default Re: How many hots?

Sorry 2" pipe and #10 - have not found all ends as of yet going by floor and section.



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Old 2/29/08, 11:27 PM
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Default Re: How many hots?

How long is the raceway (approx) and what size overcurrent protection for these #10's? What is the raceway type (PCV, EMT, Ridgid, etc)?
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Old 2/29/08, 11:35 PM
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Default Re: How many hots?

Raceway sis rigid. no overcurrent protection as yet. Plans call for 30... unless not reading it correctly. This is a remodel and not all in place yet.



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Old 2/29/08, 11:39 PM
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Default Re: How many hots?

How long is the raceway, approx?
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  #7  
Old 2/29/08, 11:44 PM
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Default Re: How many hots?

At the longest point 70 ft. That is approx. (60 to 80).



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Old 2/29/08, 11:51 PM
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Default Re: How many hots?

Although, I can follow plans, doesn't seem that the electrician can. I've decided I need help. Bringing in Electrician for backup Mon. The 2" has 11 hots now. Thanks for help, but this is beyond me.



In the world view we are all important and our mere existence effects all life.

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  #9  
Old 3/1/08, 12:14 AM
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Default Re: How many hots?

http://www.electriciancalculators.com/ampacity/nm1.pdf
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  #10  
Old 3/1/08, 12:29 AM
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Default Re: How many hots?

The short answer is in table 310.15(B)(2)(a). You have to derate 21-30 down to 45% of the 90c column rating for THHN if the pipe is more than 2 feet long (18a)
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Old 3/1/08, 12:38 AM
jtedesco1 jtedesco1 is offline
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Default Re: How many hots?

Quote:
Originally Posted by jgilleland
Need to know how many hots are permitted in one pipe?
Commercial job.

Thanks in advanced.
Raceway Fill
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  #12  
Old 3/3/08, 3:39 PM
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Jack L. Gilleland Jack L. Gilleland is offline
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Default Re: How many hots?

Just got back from a truly educational experience. Thanks all, but there is nothing like being there with the electrician. No slam to the BB I just need that physical show and tell.

Thanks Again.



In the world view we are all important and our mere existence effects all life.

Jack Gilleland
Home Inspection Services Clayton
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  #13  
Old 3/3/08, 4:00 PM
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Default Re: How many hots?

Jack those tables made me feel dumb.
Can you explain what you learned in laymans terms.?
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  #14  
Old 3/3/08, 4:14 PM
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Jack L. Gilleland Jack L. Gilleland is offline
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Default Re: How many hots?

Robert I took notes and will compile and post in the next day.



In the world view we are all important and our mere existence effects all life.

Jack Gilleland
Home Inspection Services Clayton
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Ohio_Commercial and_Home_Inspections
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