The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Sprinklered equipment 26-008
by bigpapa
Yesterday at 04:24 PM
On Delay Relay with Auto Reset
by Potseal
12/01/16 09:59 AM
Wow, that was close!
by jraef
11/28/16 07:06 PM
Earthquake in New Zeeland
by RODALCO
11/27/16 11:25 PM
Calling all Non-US members!! (Non-US only)
by Tjia1981
11/27/16 06:33 AM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 15
HotLine1 10
Trumpy 8
Texas_Ranger 8
sparkyinak 7
Who's Online
0 registered (), 215 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Page 1 of 2 1 2 >
Topic Options
Rate This Topic
#60604 - 01/06/06 04:06 PM 15 amp recepticals
vlad_tepish Offline
Member

Registered: 10/30/05
Posts: 39
Loc: Delavan,Wis,USA
the project I am working at is in dekalb county ill,,the question is,,we are not allowed to use 20 amp recepticals ,even on a 20 amp cercut>what is the logic behind this?
_________________________
Patrick

Top
Work Gear for Electricians and the Trades

Work Gear for Electricians and the Trades
Work Gear for Electricians and the Trades
Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc. etc....

#60605 - 01/06/06 04:27 PM Re: 15 amp recepticals
Ron Offline
Member

Registered: 03/13/02
Posts: 577
Loc: White Plains, NY
On a 15A circuit, you cannot use 20A receptacles, as it is a code violation.
On a 20A circuit with more than one receptacle, you can use 15A receptacles and save money over buying 20A receptacles if you like (or the engineer's specification require).
So it may be just financial.
_________________________
Ron

Top
#60606 - 01/06/06 04:46 PM Re: 15 amp recepticals
Radar Offline
Member

Registered: 04/30/04
Posts: 349
Loc: Los Angeles, CA
Using 20 amp receptacles is generally allowed per code pretty much anywhere else, so I don't think it's an NEC issue. Could it be that someone at the local jurisdiction is trying to enforce something that he/she is mistaken about?

Radar
_________________________
There are 10 types of people. Those who know binary, and those who don't.

Top
#60607 - 01/06/06 08:22 PM Re: 15 amp recepticals
InspectorE Offline
Member

Registered: 10/08/04
Posts: 51
Loc: Hudson WI USA
My suspicion is that the AHJ is trying to make sure a full 20 amp load isn't plugged into a single outlet, i.e. 80% maximum loading allowed on a 20 amp outlet is 16 amps (unless all components are rated to operate at 100%).

To be honest, I don't think I've ever seen an electrical product with a true 20 amp connector.

Top
#60608 - 01/06/06 08:49 PM Re: 15 amp recepticals
SvenNYC Offline
Member

Registered: 08/19/02
Posts: 1685
Loc: New York City
 Quote:
To be honest, I don't think I've ever seen an electrical product with a true 20 amp connector.


They're usually on high-powered 110 volt domestic air conditioners. That's where I've seen NEMA 5-20 plugs.

Of course those are usually plugged into dedicated 20 amp circuits.

Top
#60609 - 01/06/06 09:07 PM Re: 15 amp recepticals
Radar Offline
Member

Registered: 04/30/04
Posts: 349
Loc: Los Angeles, CA
Bingo.

Maybe that right there is their problem. If the receptacles are 20 amp rated, then 2 of them would/could draw 40 amps, 3 would/could be 60 amps, etc. Ya never know.
_________________________
There are 10 types of people. Those who know binary, and those who don't.

Top
#60610 - 01/06/06 10:21 PM Re: 15 amp recepticals
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9045
Loc: Estero,Fl,usa
Radar that is not really an issue. Anyone could plug 2 1440w heaters into a 5-15 duplex. That's why we have 240.4(D)

[This message has been edited by gfretwell (edited 01-07-2006).]
_________________________
Greg Fretwell

Top
#60611 - 01/07/06 07:36 AM Re: 15 amp recepticals
Radar Offline
Member

Registered: 04/30/04
Posts: 349
Loc: Los Angeles, CA
True enough - that wasn't really a serious comment. Besides, I'm trying to figure why a jurisdiction would not allow 20 amp receptacles on a 20 amp circuit. Seems to me like a similar bit of short sighted reasoning is the most likely answer.
_________________________
There are 10 types of people. Those who know binary, and those who don't.

Top
#60612 - 01/07/06 07:50 AM Re: 15 amp recepticals
InspectorE Offline
Member

Registered: 10/08/04
Posts: 51
Loc: Hudson WI USA
If ya' got 20 amp wire and 20 amp breaker, why not a 20 amp receptacle?

Sounds like a waste of money to put the 20 amp stuff in if you're going to slow it down with a smaller receptacle.

Top
#60613 - 01/07/06 03:12 PM Re: 15 amp recepticals
u2slow Offline
Member

Registered: 09/18/03
Posts: 198
Loc: Salt Spring, BC, Canada
Following the 80% circuit loading direction...

Perhaps the intent is get #10 wire and a 25A CB behind the 20A receptacle?

Top
Page 1 of 2 1 2 >



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals