eager2learn
Senior Member
- Location
- Mennifee,Ca
can someone tell me where i can find the distance allowed between gas and electrical for underground applications in the codebook
clearance
- Thread starter eager2learn
- Start date
- Status
- Location
- Windsor, CO NEC: 2017
- Occupation
- Service Manager
Re: clearance
No.
There isn't any.
No.
There isn't any.
eager2learn
Senior Member
- Location
- Mennifee,Ca
Re: clearance
so does that mean that i can have an existing gas line in parallel with a power run inside pvc tubing of the same trench as long as i am 18" below grade. there isn't any violation due to maybe having an explosion or something of that nature. i mean isn't that dangerous ?
so does that mean that i can have an existing gas line in parallel with a power run inside pvc tubing of the same trench as long as i am 18" below grade. there isn't any violation due to maybe having an explosion or something of that nature. i mean isn't that dangerous ?
curt swartz
Electrical Contractor - San Jose, CA
- Location
- San Jose, CA
- Occupation
- Electrical Contractor
Re: clearance
If both of these lines are customer owned there is no minimum clearance between them. If either or both of these lines are owned by a utility you need to check with them.
If both of these lines are customer owned there is no minimum clearance between them. If either or both of these lines are owned by a utility you need to check with them.
eager2learn
Senior Member
- Location
- Mennifee,Ca
Re: clearance
the job is located at a elementary school in ca.
the reason why i ask is because i need to intercept a power run in a trench that also has a gas line running under at about 2'. if i have to i'll move my trench over which means more money to do so
the job is located at a elementary school in ca.
the reason why i ask is because i need to intercept a power run in a trench that also has a gas line running under at about 2'. if i have to i'll move my trench over which means more money to do so
eager2learn
Senior Member
- Location
- Mennifee,Ca
Re: clearance
this wouldn't be considered a hazordous location for electrical installation
this wouldn't be considered a hazordous location for electrical installation
charlie
Senior Member
- Location
- Indianapolis
Re: clearance
There are many random lay installations with gas and electric installed where there is no intentional separation. This was not an NESC violation until the last cycle and they are now required to have one foot of separation. I am saying this from memory so I could easily be wrong on this point of requiring separation now.
There are many random lay installations with gas and electric installed where there is no intentional separation. This was not an NESC violation until the last cycle and they are now required to have one foot of separation. I am saying this from memory so I could easily be wrong on this point of requiring separation now.
eager2learn
Senior Member
- Location
- Mennifee,Ca
Re: clearance
so its probably best if i dig another trench and call it good - thanks for the info.
so its probably best if i dig another trench and call it good - thanks for the info.
ryan_618
Senior Member
- Location
- Salt Lake City, Utah
Re: clearance
Most states don't recognize the NFPA 54 for these installations. I think a probable code would be the International Fuel Gas Code, or the International Mechanical Code, or the Uniform Mechanical Code...all of which are silent on this issue.
Underground gas piping is required to have a yellow tracer wire located above the piping, so hopefully someone will see the tracer before nailing both the underground piping and the raceway.
This couldn't be considered a hazardous location, becasue flame cannot propogate under the earth, where there is not enough oxygen to sustain combustion and or flame.
Most states don't recognize the NFPA 54 for these installations. I think a probable code would be the International Fuel Gas Code, or the International Mechanical Code, or the Uniform Mechanical Code...all of which are silent on this issue.
Underground gas piping is required to have a yellow tracer wire located above the piping, so hopefully someone will see the tracer before nailing both the underground piping and the raceway.
This couldn't be considered a hazardous location, becasue flame cannot propogate under the earth, where there is not enough oxygen to sustain combustion and or flame.
eager2learn
Senior Member
- Location
- Mennifee,Ca
Re: clearance
the gas pipeline is cast iron. i think that the school has been there for over 30 years, any ways i didn't see any tracer wire anywhere. so could i potentially place the raceway (pvc tubing) about 2' apart in the same trench and bury it then call it good. i really like the info. because now i know what to tell the inspector when he comes out. i think that he will have the final say on this matter but i just wanted some info. to try to save money.
the gas pipeline is cast iron. i think that the school has been there for over 30 years, any ways i didn't see any tracer wire anywhere. so could i potentially place the raceway (pvc tubing) about 2' apart in the same trench and bury it then call it good. i really like the info. because now i know what to tell the inspector when he comes out. i think that he will have the final say on this matter but i just wanted some info. to try to save money.
ryan_618
Senior Member
- Location
- Salt Lake City, Utah
Re: clearance
That is not to say that seals have been eliminated (from gas stations) however. It is simply clarifying that this area is not classified.
You'll notice in Articles 511 and 514 of the 2005 that they addressed this.
That is not to say that seals have been eliminated (from gas stations) however. It is simply clarifying that this area is not classified.
curt swartz
Electrical Contractor - San Jose, CA
- Location
- San Jose, CA
- Occupation
- Electrical Contractor
Re: clearance
Ryan, I have never seen the tracer wire placed above gas piping. In my area the inspectors always require the tracer wire to be attached to the piping. The wire is for connecting underground tracers not to serve as a warning during trenching.
Ryan, I have never seen the tracer wire placed above gas piping. In my area the inspectors always require the tracer wire to be attached to the piping. The wire is for connecting underground tracers not to serve as a warning during trenching.
ryan_618
Senior Member
- Location
- Salt Lake City, Utah
Re: clearance
I thought it was for indication purposes.
You might be right on that Curt. I looked in the IRC, and it states that it must be adjacent to the pipe.
I thought it was for indication purposes.
- Location
- Windsor, CO NEC: 2017
- Occupation
- Service Manager
Re: clearance
Around here they have a yellow pipe (I'm not sure of it's construction), with a tracer wire wrapped around it in a spiral pattern. It's used by the locators before trenching.
I don't see any danger from combining them in a trench. If, God forbid, you hit one trenching, hopefully you'd notice (either a big arc, or a sudden ear-piercing stinky geiser) and stop before you hit the other.
Around here they have a yellow pipe (I'm not sure of it's construction), with a tracer wire wrapped around it in a spiral pattern. It's used by the locators before trenching.
I don't see any danger from combining them in a trench. If, God forbid, you hit one trenching, hopefully you'd notice (either a big arc, or a sudden ear-piercing stinky geiser) and stop before you hit the other.
eager2learn
Senior Member
- Location
- Mennifee,Ca
Re: clearance
THIS SCOOL HAS A LOT OF WORK THAT NEEDS TO BE DINE AS FAR AS UNDERGROUND - THE CAST IRON PIPE IS ALSO ATTACHED TO A GREEN PLASTIC P.V.C LINE. THEY ALSO HAVE IRRIGATION PIPE THAT IS GREY INSTEAD OF WHITE. IT'S WEIRD OUT HERE BUT I'LL JUST TAKE IT AS IT COMES
THIS SCOOL HAS A LOT OF WORK THAT NEEDS TO BE DINE AS FAR AS UNDERGROUND - THE CAST IRON PIPE IS ALSO ATTACHED TO A GREEN PLASTIC P.V.C LINE. THEY ALSO HAVE IRRIGATION PIPE THAT IS GREY INSTEAD OF WHITE. IT'S WEIRD OUT HERE BUT I'LL JUST TAKE IT AS IT COMES
- Status