jbiddle2
(James J. Biddle)
January 31, 2018, 10:55pm
1
Is there a reason to flag the following:
Work shop garage
Garage Sub Panel
Panel has main shut off, 3 220 circuits for individual tools and
several 15 amp receptacles
Panel has grounds isolated and ground bar in the ground.
I thought it was a good idea on the six throws idea
Main Panel is on the other end of the house.
Question: I thought it was unusual for a Sub Panel to have a main breaker.
Am I correct in assuming that the panel is fine provided the grounds are isolated and grounded?
Thanks, Jay
Tilley Home Inspection
rmeier2
(Robert Meier)
January 31, 2018, 11:07pm
3
jbiddle2:
Work shop garage
Garage Sub Panel
Panel has main shut off, 3 220 circuits for individual tools and
several 15 amp receptacles
Panel has grounds isolated and ground bar in the ground.
If the garage is attached no main is required. Neutral and EGC’s are required to be isolated from each other with the EGC’s connected to the panel enclosure. Sounds like you have it covered.
ccurrins
(Christopher Currins, CMI)
January 31, 2018, 11:28pm
4
Sub-panels do not have a “main breaker”; the correct term is Service Disconnect. There is Only One Service Disconnect per service at the property.
The “main breaker” in your sub-panel is just a disconnect, for convenience.
Jim_Port
(Jim Port)
January 31, 2018, 11:43pm
5
Main breaker is commonly used to refer to the breaker that cuts all power to the panel. The manufacturers label their panels as main breaker or main lug only. It does not mean it is the service.
rmeier2
(Robert Meier)
February 1, 2018, 1:21am
6
I agree, a main breaker is as Jim has described. A service disconnect is a completely different animal. A main breaker can be a service disconnect but it doesn’t have to be one.
jfunderburk
(Joe Funderburk, CMI)
February 1, 2018, 1:33am
7
This may be helpful for future reference.
rmeier2
(Robert Meier)
February 1, 2018, 1:49am
8
Nice graphic but is this a detached garage in the OP?
Jim_Port
(Jim Port)
February 1, 2018, 2:09am
9
Also doesn’t show the neutral to ground bond at the outbuilding with the 3 wire feeder.
jfunderburk
(Joe Funderburk, CMI)
February 1, 2018, 2:30am
10
I assumed. Maybe incorrectly.
jfunderburk
(Joe Funderburk, CMI)
February 1, 2018, 2:34am
11
I think I got the images from the 2009 IRC.
rmeier2
(Robert Meier)
February 1, 2018, 2:41am
12
Looks like it’s there in the second attachment.
Jim_Port
(Jim Port)
February 1, 2018, 2:49am
13
Missed it when they moved it from the bottom.