ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
A 5-20(20a) receptacle is legal on a 15a circuit?
by libellis - 10/10/21 12:46 PM
GFCI's pops in large numbers
by dsk - 10/07/21 03:46 PM
Backup Generator Done Right
by timmp - 10/06/21 02:07 PM
How's all our Non-US folks doing?
by dsk - 09/30/21 05:06 AM
Well I am back to stay (nearly 6 years)
by Bill Addiss - 09/26/21 11:09 PM
New in the Gallery:
240/208 to a house
240/208 to a house
by wa2ise, October 9
Now you know.
Now you know.
by Tom_Horne, September 7
Who's Online Now
0 members (), 5 guests, and 23 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#46869 01/04/05 10:01 PM
Joined: Jun 2004
Posts: 613
S
Member
Today at the supply house I asked for a Nema 3R 240 volt 60 amp single phase non-fusible disconnect switch suitible for service equipment.Well they came out with a 3-pole safety switch.

I want to use this for a Building Disconnecting Means on the exterior of the accessory building before entering to the panel.My overcurrent protection is where the feeder originates.

Maybe it is more common to use a Nema 3R circuit breaker enclosure with a circuit breaker as the disconnect instead of a non-fusible switch.

What have you used or seen in the field. Any part #'s would be helpful.

shortcircuit

#46870 01/04/05 11:04 PM
Joined: Nov 2000
Posts: 2,148
R
Member
I don't think that you will find many non-fusible disconnects that are listed as service equipment.
Don


Don(resqcapt19)
#46871 01/05/05 10:31 AM
Joined: Jul 2001
Posts: 599
J
JBD Offline
Member
Most of Square D's non-fusible 240V and 480V disconnects/safety switches are UL Listed as service entrance.

Square D does not make a knive blade design 2 pole non-fusible switch except as NEMA 3R 240V 30 & 60A sizes. So, it is likely that your supply house only stocks 3 pole devices.

#46872 01/05/05 03:06 PM
Joined: May 2004
Posts: 81
V
Member
A breaker disconnect would be a lot less expensive. Almost half the price

#46873 01/05/05 09:07 PM
Joined: Nov 2002
Posts: 267
W
Member
We sell the enclosed circuit breaker 3R for service disconnects. It is a lot less expensive. Smallest we sell is the 100 amp rated size. Just place a 60 amp 2-pole cb in it.

#46874 01/06/05 09:59 AM
Joined: Aug 2001
Posts: 329
S
Member
If there is a breaker at the source of the feeder and it's coming from another panel, it's a sub panel not service eqpt. Use any 3R disconnect.

#46875 01/06/05 10:10 PM
Joined: Jun 2004
Posts: 613
S
Member
I decided to get a Nema 3R circuit breaker enclosure suitable for service equipment for my accessory building disconnect which has a feeder run underground to it from a seperate building.

A knife style non-fusible disconnect suitable for service equipment was unavailable in the supply house.

I wanted to use a knife style disconnect outside the building because I envisioned that it would be easier for emergency personal to identify it as the building disconnect and it would be just a throw of a handle to shut down the building power.

Steve Miller...225.31 requires a disconnect and 225.36 says it must be suitable for service equipment.

thanx

shortcircuit


Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
MarkC10
MarkC10
CA, Inland Empire
Posts: 43
Joined: September 2013
Top Posters(30 Days)
dsk 5
Popular Topics(Views)
284,541 Are you busy
217,274 Re: Forum
203,620 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5