I am the base electrician at an Air National Guard base. My safety officer and I are in disagreement about whether or not the NEC allows me to suspend my control conduit from the natural gas line that feeds a unit heater that is suspended from the ceiling of a warehouse. If it makes any difference the control voltage is 110, the gas line is black pipe and I plan to use back to back minnies. Paul
unit heaters
- Thread starter paulrb
- Start date
- Status
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Re: unit heaters
I would ask him for a code reference. I can't find anything in Article 300.11 that would prohibit this. We normally make the final connections with type MC cable and cable tie it to the gas pipe. Some may argue that since the unit is hanging in fee air and can move, than a flexible wiring method may be required which would prohibit the use of EMT.
I would ask him for a code reference. I can't find anything in Article 300.11 that would prohibit this. We normally make the final connections with type MC cable and cable tie it to the gas pipe. Some may argue that since the unit is hanging in fee air and can move, than a flexible wiring method may be required which would prohibit the use of EMT.
ryan_618
Senior Member
- Location
- Salt Lake City, Utah
Re: unit heaters
Although I hate to say it, he may be citing 110.12 for workmanship. I mean let's face it...hanging a raceway from a gas pipe is pretty cheesy.
Although I hate to say it, he may be citing 110.12 for workmanship. I mean let's face it...hanging a raceway from a gas pipe is pretty cheesy.
- Location
- Massachusetts
Re: unit heaters
Frank gas pipe is not a raceway so 300.11(B) is not relevant.
Frank gas pipe is not a raceway so 300.11(B) is not relevant.
- Location
- Windsor, CO NEC: 2017
- Occupation
- Service Manager
Re: unit heaters
Frank, the EMT is hanging from the gas pipe, according to the orginal post.
Frank, the EMT is hanging from the gas pipe, according to the orginal post.
- Location
- Massachusetts
Re: unit heaters
In my opinion it would be a very rare occurrence that EMT was able to support a larger threaded pipe.
Hey you might get away with that if if I was a new to the world.
In my opinion it would be a very rare occurrence that EMT was able to support a larger threaded pipe.
jimwalker
Senior Member
- Location
- TAMPA FLORIDA
Re: unit heaters
I believe it's a building code that one trade can not use the other trades to support each other.I would not chance the liability of attaching to another trade.Are you governed by NEC and building codes ?
I believe it's a building code that one trade can not use the other trades to support each other.I would not chance the liability of attaching to another trade.Are you governed by NEC and building codes ?
- Location
- Massachusetts
Re: unit heaters
What do you staple your NM to?
ryan_618
Senior Member
- Location
- Salt Lake City, Utah
Re: unit heaters
I don't see any rule in any code (particularly the Fuel Gas Code) that addresses it.
[ June 22, 2005, 08:54 AM: Message edited by: ryan_618 ]
Everybody is governed by a building code.
I don't see any rule in any code (particularly the Fuel Gas Code) that addresses it.
[ June 22, 2005, 08:54 AM: Message edited by: ryan_618 ]
charlie
Senior Member
- Location
- Indianapolis
Re: unit heaters
In my opinion, it would be a cheesy installation and a mess if the gas pipe needed to be replaced or tapped into for some reason. I don't know of anything that would prohibit the installation except for workmanship and common sense.
In my opinion, it would be a cheesy installation and a mess if the gas pipe needed to be replaced or tapped into for some reason. I don't know of anything that would prohibit the installation except for workmanship and common sense.
jimwalker
Senior Member
- Location
- TAMPA FLORIDA
Re: unit heaters
"What do you staple your NM to? " never thaught of it that way Bob.
"What do you staple your NM to? " never thaught of it that way Bob.
allenwayne
Senior Member
Re: unit heaters
Come on Jim 3m stackers they are listed for securing to framing members and can hold alot of nm ,P.S. if you use the kind made for furring and back to back them then you could hold 2X that
Come on Jim 3m stackers they are listed for securing to framing members and can hold alot of nm
,P.S. if you use the kind made for furring and back to back them then you could hold 2X that jimwalker
Senior Member
- Location
- TAMPA FLORIDA
Re: unit heaters
I sure hope it's legal cause i used there 2x4 to hold my plastic box too.
I do recall being told not to use the unistrut holding the plumbers pipe to hold my conduit.Was told it would fail.We can't use the ceiling guys grid wire to hold our mc
[ June 23, 2005, 05:55 AM: Message edited by: jimwalker ]
I sure hope it's legal cause i used there 2x4 to hold my plastic box too.
I do recall being told not to use the unistrut holding the plumbers pipe to hold my conduit.Was told it would fail.We can't use the ceiling guys grid wire to hold our mc
[ June 23, 2005, 05:55 AM: Message edited by: jimwalker ]
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