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# of outlets by the point? #19923
01/05/03 08:13 PM
01/05/03 08:13 PM
electure  Offline
OP
Member
Joined: Dec 2000
Posts: 4,263
Fullerton, CA USA
OK, I've got to confess...I was watching "This Old House" today.
They had an "electrician" that in addition to some incredibly bad work mentioned that outlets were computed by the "point", with a lighting outlet=1 point and a recp=2 points. [Linked Image] (A certain # of points could be put on a 15A circ, 20 A circ).
Huh?

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Re: # of outlets by the point? #19924
01/05/03 10:06 PM
01/05/03 10:06 PM
E
Electric Eagle  Offline
Member
Joined: Apr 2002
Posts: 914
Alpharetta, GA
I didn't see the show, but I'll partially defend the guy. This is probably just his way of determining circuit capacity. Almost everybody I know uses different numbers for residential. Some go strictly by X number of openings, others will look at it with some grace given to outlets that you know won't be used and don't count them. How do you determine when to cut off a circuit, and don't tell me you calculate the actual load because you have no way to know what people will use them for and residential doesn't have the same restrictions that commercial does.

[This message has been edited by Electric Eagle (edited 01-05-2003).]

Re: # of outlets by the point? #19925
01/05/03 10:33 PM
01/05/03 10:33 PM
G
ga.sparky56  Offline
Member
Joined: Nov 2002
Posts: 558
young harris georgia usa
Eagle do you always have a plan with the electrical on it or do you lay most of it out yourself?

Re: # of outlets by the point? #19926
01/05/03 10:58 PM
01/05/03 10:58 PM
E
Electric Eagle  Offline
Member
Joined: Apr 2002
Posts: 914
Alpharetta, GA
Usually we have to lay it out ourselves. Even if we have prints, they don't break it down by circuit, just where they want the fixtures and switches.

Re: # of outlets by the point? #19927
01/06/03 06:26 PM
01/06/03 06:26 PM
S
Sandro  Offline
Member
Joined: Dec 2001
Posts: 444
Stoney Creek, ON, Canada
Hrm... Canadian EC states that maximum 12 receptacles on a 15A circuit. I wonder how they agreed upon that figure? 1A per receptacle? 12A = 80%

Re: # of outlets by the point? #19928
01/06/03 07:56 PM
01/06/03 07:56 PM
electure  Offline
OP
Member
Joined: Dec 2000
Posts: 4,263
Fullerton, CA USA
Electric Eagle,
No need to defend the guy. I just haven't heard of such a "system", and wondered if you guys had. (I'm not trying to ruffle any feathers)
Some of the things the guy did on the show were undefendable.

How do you resi guys determine the number and distribution of your general-use recps./lighting outlets? (will we get 5 different answers from 5 different people?)

Re: # of outlets by the point? #19929
01/06/03 08:03 PM
01/06/03 08:03 PM
S
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,342
AFCI's have some bearing in the layout here, since we are required to protect 'living areas', the definition has been 'interpeted' to death......

Re: # of outlets by the point? #19930
01/06/03 08:12 PM
01/06/03 08:12 PM
E
Electric Eagle  Offline
Member
Joined: Apr 2002
Posts: 914
Alpharetta, GA
electure,

We generally take 13 openings per circuit. But this is loosely defined, because like I said earlier some outlets we know will get rare use and other times you know a 400 watt fixture will be on the circuit. I guess we get the 13 figure from the maximum outlets allowed on a 20 amp commercial circuit. Also if I know 20 - 60 watt fixture are going to draw .5 amps each, I have no problem putting all on one circuit.

How do you determine circuits?

Re: # of outlets by the point? #19931
01/06/03 08:30 PM
01/06/03 08:30 PM
G
ga.sparky56  Offline
Member
Joined: Nov 2002
Posts: 558
young harris georgia usa
Eagles method approximates ours pretty close.Does anyone else use all 12?

Re: # of outlets by the point? #19932
01/06/03 08:57 PM
01/06/03 08:57 PM
A
arseegee  Offline
Member
Joined: Jan 2002
Posts: 324
Statesboro, GA USA
For residential we put 8 to 10 recepts per 20A circuits. No lights on recept circuits. All lighting circuits are loaded to 1800 watts and we calculate the maximum fixture for the outlet. If its a bedroom we figure fan with 4 bulb light kit, 60 watt closet and so on.

I know we wire heavy but I picked up a contractor because his electrician had a long run of 12 with lights and recepts and when the home owner plugged in an iron the lights dimmed and flickered. That contractor spends about $150K a year with me now.

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