Fused disconnect required

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jumper said:
I typed quickly, I know all this.

So, does 550 apply even though you have 208/120V?
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Yes in the section posted it is stated you make an adjustment for the voltage every thing else is applicable as if it was a standard mobile home


Edit: As applicable to the supply / (service Equipment)
 
codequestion said:
You got it wrong. Please re read post #1. Disco in question is not service disco, fed from feeder circuit breaker on panel #10 customer owned 80 feet away and the disco is next to trailer. Load side of disco is feeding the trailer.

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david said:
This is copied and pasted from 2008 NEC check the section and see if it is the same in 2014
550.32 Service Equipment.

(A) Mobile Home Service Equipment.
The service equipment shall be permitted to be located elsewhere on the premises, provided that a disconnecting means suitable for use as service equipment is located within sight from and not more than 9.0 m (30 ft)
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Okay, disco location checks out. Remote breaker feeding disco good.
 
david said:
yes i know just trying to drop a hint since we hope not to frustrate anyone
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I totally understand.

We all had to go through the process and still do. The NEC is a painful frustrating document but if one does not try, one is handicapped in the learning process.

If OP is gonna do this for a living then schooling is needed.
 
jumper said:
I totally understand.

We all had to go through the process and still do. The NEC is a painful frustrating document but if one does not try, one is handicapped in the learning process.

If OP is gonna do this for a living then schooling is needed.
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The disco in question has to be service rated nec 550.32 (A) since service equipment is located in my case elsewhere. Since disco is going to be service rated it has to be fused. The disco in question is located within 30 feet from trailer.

Now the engineer of this project has spec the disco in question as non fused general duty switch and does not indicate service rated.

The disco in question is gonna be fused.

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codequestion said:
The disco in question has to be service rated nec 550.32 (A) since service equipment is located in my case elsewhere. Since disco is going to be service rated it has to be fused.

Now the engineer of this project has spec the disco in question as non fused general duty switch and does not indicate service rated.

The disco in question is gonna be fused.

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Fuses are not what determines if the disco is service rated.
 
codequestion said:
The disco in question has to be service rated nec 550.32 (A) since service equipment is located in my case elsewhere. Since disco is going to be service rated it has to be fused. The disco in question is located within 30 feet from trailer.

Now the engineer of this project has spec the disco in question as non fused general duty switch and does not indicate service rated.

The disco in question is gonna be fused.

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The engineer may have read 225.36 and failed to read 550.32 (A) it happens
 
david said:
I always understood over current protection was always associated with service rated equipment.

fuse or breakers or adjacent to such equipment am i wrong on that
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The OCPD is sometimes incorporated as part of the disconnect (breakers or fused disconnect switch) but it can also be immediately adjacent to the service disconnect instead.
The key point is that equipment rated for service use:
1. Can withstand being fed by an unfused set of conductors, and
2. Incorporates a means to bond the service neutral to the GES/EGC network.
Suitable only for use as service equipment, on the other hand, means that you would have to add extra parts to isolate the neutral from the EGCs

And, as jumper points out, 3. It has to pass UL tests for service equipment and be labelled as such. This marking, AFAIK, has to do mainly with 1 and 2.
 
david said:
I always understood over current protection was always associated with service rated equipment.

fuse or breakers or adjacent to such equipment am i wrong on that
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Yes, that is covered in 230. But here we have a remote service, breaker,feeder, disco, and trailor.

The way I read it, a little unsure, is that the trailor disco still has to be SUSE rated.

The OCPD, whether a part or or adjacent to, does not make a disco SUSE rated though, 230.66 compliance does.

230.66 Marking. Service equipment rated at 1000 volts or less shall be marked to identify it as being suitable for use as service equipment. All service equipment shall be listed. Individual meter socket enclosures shall not be considered service equipment.
 
jumper said:
So, in summary:

Breaker protects feeder.

Disco in proper location for trailor. Should be SUSE rated AFAICT.

Panel has main breaker.

Why would you need fuses?
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Panel sechdule for the panel in the trailer is not provided. I do not know if panel is MLO or has main circuit breaker. The ffeder breaker feeding to the disco is 100 amps.

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jumper said:
What does 550.11(A) say about disconnecting means for the panel inside the trailor?
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Panel or switch in the trailer has to have main circuit breaker or fuse.

The engineer does not show trailor panel just disco non fused.

So the nonfuse disco outside on rack next to trailer has to be service rated but panel inside the trailer has to have main overcurrent protection.

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