codequestion
Banned
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- MD, USA
I dont know distance range or limit of circuit breaker overcurrent protection can it go indefinitely?
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Fused disconnect required
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jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
What happens to amperage in a series circuit?
Voltage?
What does an OCPD operate off given the two?
codequestion
Banned
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- MD, USA
jumper
Senior Member
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- 3 Hr 2 Min from Winged Horses
So except for the added resistance of the length of the feeder, does the 80 feet factor in when deciding if you need fuses or not? Will the breaker still protect the feeder?
codequestion
Banned
- Location
- MD, USA
Yes but is fused fisco req by nec 2014 in my secenario?
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jumper
Senior Member
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- 3 Hr 2 Min from Winged Horses
Go read 550.33, 550.11, and 225 part II and come back and ask.
codequestion
Banned
- Location
- MD, USA
Please see post #5. I have 120/208v three phase but 550.4 says article applicable to 120v. Would 550 be applicable to 120/208v?
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jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
What does the last sentence of that section say?
david
Senior Member
- Location
- Pennsylvania
90.2 Scope.
(A) Covered. This Code covers the installation of electrical conductors, equipment, and raceways; signaling and communications conductors, equipment, and raceways; and optical fiber cables and raceways for the following:
(1) Public and private premises, including buildings, structures, mobile homes, recreational vehicles, and floating buildings
If your trailer has a vehicle title and is covered under the scope of the NEC and it is not a recreational vehicle
including campers than it is covered under article 550
550.4 General Requirements.
(A) Mobile Home Not Intended as a Dwelling Unit.
“Where different voltage is required by either design or available power supply system, adjustment shall be made in accordance with other articles and sections for the voltage used. “
Since your trailer is covered under 550.4 not intended for a dwelling unit other voltages are exceptable
david
Senior Member
- Location
- Pennsylvania
I’ m not sure what a fuse being needed means, Unlike 225.36 statement of service rated, an article 550 disconnect states the disconnect with in 30 feet of the mobile home needs to be service rated
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
david
Senior Member
- Location
- Pennsylvania
It is my understanding article 545 does not apply to vehicle titled structures looking at the scoping provisions for the NEC it seems to me it would fall under article 550
90.2 Scope. (B) Not Covered. This Code does not cover the following:
“ or automotive vehicles other than mobile homes and recreational vehicles “
david
Senior Member
- Location
- Pennsylvania
We are getting there David, OP needs to get a few things clear first.
OK
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
Here is where we are at:
Breaker in panel protects feeder. Fuses not needed to protect feeder.
Disco is planned and needed. We haven’t discussed where the disco is located or its rating yet, as you noted.
We just got to the fact 550 applies to 208/120.
We do not know if panel has OCPD or if required yet, fuses may come back into play.....
Disco is gonna have a GES, but have not discussed trailor yet.
I believe there is something about the EGC that needs to be discussed.
See what I am trying to do now?
Breaker in panel protects feeder. Fuses not needed to protect feeder.
Disco is planned and needed. We haven’t discussed where the disco is located or its rating yet, as you noted.
We just got to the fact 550 applies to 208/120.
We do not know if panel has OCPD or if required yet, fuses may come back into play.....
Disco is gonna have a GES, but have not discussed trailor yet.
I believe there is something about the EGC that needs to be discussed.
See what I am trying to do now?
codequestion
Banned
- Location
- MD, USA
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
Senior Member
- Location
- Pennsylvania
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)
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)
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
Yes.
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
I typed quickly, I know all this.
So, does 550 apply even though you have 208/120V?
david
Senior Member
- Location
- Pennsylvania
I believe this is where you guys are going but I could be wrong
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