Number Of Receptacles In Reference To Hallisseydesign

ryandumas

This is my first post I am a Electrical Contractor out of New Orleans I have been reading some of the posts and I felt compelled to comment on a paticular post that Hallisseydesign posted. I belive Hallisseydesign may be somewhat correct with his statement about the number of Receptacles on a circuit. Receptacles are calculated at 180 volt-amperes per strap. Therefore, when the source is 120 volts, the rating of each receptacle is 1.5 amperes(180/120= 1.5). Now knowing this we can say that ten receptacles are permitted on a 15-ampere overcurrent protective device (15/1.5= 10). Thirteen receptacles are permitted on a 20-ampere overcurrent protective device (20/1.5=13.3). Of course this is used with commercial and not residential. If I am incorrect please let me know.

JohnJ0906

Welcome to the forum!!

Some jurisdictions DO have amendments to the NEC that limit the number of receptacles on a circuit.

Not that I disagree with you, but no way am I putting 13 receptacles on one 20 amp circuit, unless the (stamped) prints say to.

Can you imagine 13 secretaries with 13 space heaters....

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John from Baltimore
"One Day at a Time"
All replies based on the 2008 NEC

Speedy Petey

DAMN this statement couldn't be more true!

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mdshunk

Right... in commercial work. Dwelling units have no such limitations.

CE1

....when it is 90 degs. outside and they complain the A/C isn't working.
.....complain that thier computers keep tripping the circuit breaker.

ryandumas

The statement I made is just fact in the NEC code but by no means would I ever put that many receptacles on a circuit. But I do thank everybody for their replys.
Anways this is a great site for information and I'm sure I will be here evryday to check out the topics thanks for a great site
Ryan.

macmikeman

Yes, I think about 13 secretaries and 13 space heaters often.........

mdshunk

Having fantasies of being a space heater under a secretary's desk?

For 9 of 10 that I run across, no thanks. Yuk!

mahlere

in Hawaii...I call bull****....

I'll buy the thinking about 13 secretaries....but 13 space heaters? I'm not buying it, and you shouldn't be selling it....

macmikeman

Ahh, but you don't know how I put the heaters to use.... And to MD, please don't bring any reality into my secretary dreams....

mahlere

well, if you need heaters to get the secretaries hot...then you got bigger problems than I thought

macmikeman

It ain't for the secretary's, its for me you young pup you........

Celtic

Welcome aboard .....


...and therein lies ONE of the many faults with Hallisseydesign's logic.

Commercial is rated at 180VA, but not resi. To even attempt to equate the two types of buildings is completely erroneous. Hallisseydesign was incorrect with his statements ~ based on NEC code. Hallisseydesign had mentioned some "other" code, when asked to provide documentation of this phantom code, he promptly disappeared.
Had he simply provided an amended version of the NEC that was adapted in that region, he might not have been brutalized so unmercifully.

But that's not your problem

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Celtic

I'd do it in a heartbeat ~ provided print did not show otherwise.

Let's even reduce your 13 example to 4 ....4 space heaters @1500W = 6000W ; 6000w/120v = 50A

Even a circuit that is well below the minimum NEC standard is in jeopardy from the unknown variable of a person.

Space heaters and secretaries are a great money making combination!

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mdshunk

That is, if they didn't find a receptacle 10 feet away on another circuit that they can chain together 3 or 4 plug strips to get their space heater up and running.

dougchips

I can trip a 20 amp with two space heaters (I have talent)

mdshunk

Sounds like a game show.

Instead of "I can name that tune in two notes". "I can trip that breaker with a space heater and a worm drive saw".

Celtic

GAME ON !!!

I can trip a 20A CB with a space heater and 1 luminaire...

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firemike

I can trip a 20A circuit with all my wifes hair care gizmos plugged in at once.

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-Mike-

jbfan

And don't forget the coffee pots brought from home with the 2' cord and the
.99 cent ext. cord!

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We are the people (our parents warned us about) (Jimmy Buffett)