gas pump wiring

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wirenut520

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here is a multi part question ? can i run emt in to the top of a gas pump 514.7 i think says yes ?
and if the circuit is Intrinsically safe do i need an explosionproof fitting or can i just seal the conduit with duckseal ?
 
rbalex

rbalex

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You have made a fairly large leap in logic here. While 514.7, or more specifically 511.7, permits EMT above a Class I location, it doesn?t necessarily permit it to be run into a Class I location from above.

Assuming it contains the IS wiring described in ?part 2,? there are several things for consideration:

  • The wiring must be installed per a control drawing [504.10(A)]
  • A seal must be installed at the dispenser penetration. [514.9(A)]
  • The seal should be explosion-proof ? even with IS wiring. [With all due respect to CMP 14; they blew this between 504.30(A)(2) and 504.70. If any seal into an enclosure must be explosionproof, all seals into the same enclosure must be. Unfortunately, unless it is prevented by the control drawing, there is no direct NEC interpretation that would require it.]
  • The grounding/bonding requirements of 504.50 and 504.60 must still be observed. These also affect installations in the unclassified part of a run.
 
Sierrasparky

Sierrasparky

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wirenut520 said:
here is a multi part question ? can i run emt in to the top of a gas pump 514.7 i think says yes ?
and if the circuit is Intrinsically safe do i need an explosionproof fitting or can i just seal the conduit with duckseal ?
Click to expand...

Nope.
How can you provide a seal-off. duct seal is not a alternative from what I know. looks like rigid and chico are gonna do it.
 
Sierrasparky

Sierrasparky

Senior Member
Location
USA
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Electrician ,contractor
By the way is'nt IS wires usially to sensors in or about the storage tank. These wires may have the most exposure to an explosive situation. Correct me if I am wrong.
 
D

Derick

Member
Sierrasparky said:
By the way is'nt IS wires usially to sensors in or about the storage tank. These wires may have the most exposure to an explosive situation. Correct me if I am wrong.
Click to expand...

Once you are inside pump sump or dispenser sump (IS circuitry is exposed)
Nothing wrong with that since all that cable is signal going back to TMS.But probe,sensor,interstitial splice to Belden has to be made inside CL1 Div1 box.
 
W

wallyworld

Senior Member
Derick said:
Once you are inside pump sump or dispenser sump (IS circuitry is exposed)
Nothing wrong with that since all that cable is signal going back to TMS.But probe,sensor,interstitial splice to Belden has to be made inside CL1 Div1 box.
Click to expand...

You mean TLS? Veeder Root allows a flying splice in certain cases, saw cut wiring for instance
 
Sierrasparky

Sierrasparky

Senior Member
Location
USA
Occupation
Electrician ,contractor
Been a very long time since I worked on a filling station.
Is Veeder root the only manufacture of those.
I'd like to have stock in that company.
 
D

Derick

Member
wallyworld said:
You mean TLS? Veeder Root allows a flying splice in certain cases, saw cut wiring for instance
Click to expand...

What do you mean by saw cut wiring? Did you mean cut into existing conduit or so?
Sometimes I need to that. It depends how the existing conditions looks like.
For a sake say it?s done by the book and I am outside of CL1 Div.2 (somewhere between C-store and Fuel Island).I would cut existing black top,concrete,whatever to access existing conduit. I would install 3.5 box
for a reasons.1-most economical with traffic lid, 2-big enough to install new seal off (on existing conduit going back to fuel islands),3-whatever splice
I had to make its made in this box.

I can't figure out meaning of flying splice.What is it?

Thank you
 
H

hardworkingstiff

Senior Member
Location
Wilmington, NC
Derick said:
What do you mean by saw cut wiring? Did you mean cut into existing conduit or so?
Sometimes I need to that. It depends how the existing conditions looks like.
For a sake say it?s done by the book and I am outside of CL1 Div.2 (somewhere between C-store and Fuel Island).I would cut existing black top,concrete,whatever to access existing conduit. I would install 3.5 box
for a reasons.1-most economical with traffic lid, 2-big enough to install new seal off (on existing conduit going back to fuel islands),3-whatever splice
I had to make its made in this box.

I can't figure out meaning of flying splice.What is it?

Thank you
Click to expand...

Go here

http://www.veeder.com/page/search.html

Click on this
TLS-4xx Site Prep and Installation Manual (577013-879 Rev. A)

Look on page 36.
 
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