ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
MRI LED lights dimmer control replacement - wow!
by ghost307. 01/19/18 11:37 AM
Video: Inventor of the GFCI self-testing shocks
by Bill Addiss. 01/17/18 11:11 PM
FPE in Germany
by HotLine1. 01/17/18 07:07 PM
VDE 0100 to introduce AFCIs
by LongRunner. 01/17/18 10:32 AM
Fujifilm Recalls Power Adapter Wall Plugs
by Admin. 01/16/18 07:04 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
1 registered members (Troy), 20 guests, and 11 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
100 amp panel #41288
08/24/04 03:14 PM
08/24/04 03:14 PM
J
jayson  Offline OP
Member
Joined: May 2004
Posts: 49
russellspringsky
in a house panel with a 100 amp main can u put a 100 amp breaker on the bus . like if in the panel i have 2 20 amp lighting circuit breakers and 30 amp and 50 amp range and a 100 amp below that feeding central air unit.any help would be aprecicated thanks

Work Gear for Electricians and the Trades
Re: 100 amp panel #41289
08/24/04 03:23 PM
08/24/04 03:23 PM
C
cpalm1  Offline
Member
Joined: Jan 2004
Posts: 66
you should not have a 100 amp breaker on the A/C it should be 20, 30, or 40 amps depending on the A/C units rating

Re: 100 amp panel #41290
08/24/04 07:18 PM
08/24/04 07:18 PM
E
e57  Offline
Member
Joined: May 2003
Posts: 2,876
S.F.,CA USA
60A tops if the thing (AC) is a real beast, sounds sketchy?


Mark Heller
"Well - I oughta....." -Jackie Gleason
Re: 100 amp panel #41291
08/24/04 07:36 PM
08/24/04 07:36 PM
D
Dave55  Offline
Member
Joined: May 2004
Posts: 697
Crystal Lake, Illinois, USA
Typically, the wire is sized to the load, and the breaker matches the wire size. There are other circumstances, of course. What is the air conditioning load, and the wire gauge?

Dave55

Re: 100 amp panel #41292
08/24/04 08:47 PM
08/24/04 08:47 PM
E
Electric Eagle  Offline
Member
Joined: Apr 2002
Posts: 914
Alpharetta, GA
It is posible to have a 100 breaker for A/C, it's very common around here to have a 100 amp breaker serving a disconnect for 3 or 4 A/C units rather than having 3 or 4 diferent home runs for each unit.

To answer the guy's original question, yes it is posible, but if the A/C's draws a combined load anywhere near that 100 amps, it's too much for the panel with all the olther stuff.

Re: 100 amp panel #41293
08/24/04 09:16 PM
08/24/04 09:16 PM
J
jayson  Offline OP
Member
Joined: May 2004
Posts: 49
russellspringsky
the 100 amp breaker is feeding a diconnnect with a 60 amp breaker.

Re: 100 amp panel #41294
08/25/04 08:36 AM
08/25/04 08:36 AM
G
Geno  Offline
Member
Joined: Aug 2001
Posts: 16
Syracuse, NY USA
What size is the wire?

Re: 100 amp panel #41295
09/03/04 01:53 PM
09/03/04 01:53 PM
S
SJT  Offline
Member
Joined: Jul 2002
Posts: 241
PATCHOGUE, N.Y.
Do you have a range and a dryer on this panel also? It sounds like you need to upgrade to a 200 amp service. Things would be OK, but then the 60 amp load of the AC arrives on the scene.
Very possible the main could trip. Is it worth living with that chance?


Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
dougwells
dougwells
kamloops BC Canada
Posts: 1,142
Joined: May 2003
Show All Member Profiles 
Top Posters(30 Days)
Admin 20
sparky 18
Potseal 14
Popular Topics(Views)
243,552 Are you busy
180,359 Re: Forum
170,837 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.024s Queries: 14 (0.004s) Memory: 0.9901 MB (Peak: 1.1491 MB) Zlib enabled. Server Time: 2018-01-19 21:29:17 UTC