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Building Disconnect #46869
01/04/05 09:01 PM
01/04/05 09:01 PM
S
shortcircuit  Offline OP
Member
Joined: Jun 2004
Posts: 608
massachusetts
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

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Re: Building Disconnect #46870
01/04/05 10:04 PM
01/04/05 10:04 PM
R
resqcapt19  Offline
Member
Joined: Nov 2000
Posts: 2,148
IL
I don't think that you will find many non-fusible disconnects that are listed as service equipment.
Don


Don(resqcapt19)
Re: Building Disconnect #46871
01/05/05 09:31 AM
01/05/05 09:31 AM
J
JBD  Offline
Member
Joined: Jul 2001
Posts: 599
WI, USA
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.

Re: Building Disconnect #46872
01/05/05 02:06 PM
01/05/05 02:06 PM
V
velect  Offline
Member
Joined: May 2004
Posts: 81
st joseph mi usa
A breaker disconnect would be a lot less expensive. Almost half the price

Re: Building Disconnect #46873
01/05/05 08:07 PM
01/05/05 08:07 PM
W
Wirenuttt  Offline
Member
Joined: Nov 2002
Posts: 267
Massachusetts
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.

Re: Building Disconnect #46874
01/06/05 08:59 AM
01/06/05 08:59 AM
S
Steve Miller  Offline
Member
Joined: Aug 2001
Posts: 325
Loudoun Cty, VA
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.

Re: Building Disconnect #46875
01/06/05 09:10 PM
01/06/05 09:10 PM
S
shortcircuit  Offline OP
Member
Joined: Jun 2004
Posts: 608
massachusetts
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


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