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Old 09-21-2016, 01:41 AM   #1
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Default Voltage induced into locator wire in gas line.

If you have an underground conductor run parallel to a gas line, is it possible to induce voltage into the locator wire in the gas line?

Obviously there's more to this story but I want to hear what you guys think.
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Old 09-21-2016, 06:00 AM   #2
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I'd think so, why not? It's a long parallel run.

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Old 09-21-2016, 06:36 AM   #3
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If you have an underground conductor run parallel to a gas line, is it possible to induce voltage into the locator wire in the gas line?

Obviously there's more to this story but I want to hear what you guys think.
Unless there is a power feed run parallel to it, I'd say no !

I googled it thou .... apparently overhead Tx lines can induce into the gas line, and therefore into the tracer
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Old 09-21-2016, 07:46 AM   #4
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Is there anything in code about separation of gas and power in underground installations? I know Alberta recommends 300mm separation or a pressure treated 2 X 6 in between.
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Old 09-21-2016, 08:38 AM   #5
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Is there anything in code about separation of gas and power in underground installations? I know Alberta recommends 300mm separation or a pressure treated 2 X 6 in between.
12" separation ... I think it's referred to in 12-0129(13) ... which states req's are in CSA C22.3 No7 (Underground Systems)

Edit** Thats rule 12-012 (13)
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Last edited by emtnut; 09-21-2016 at 09:01 AM. Reason: Wrong code #
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Old 09-21-2016, 09:03 AM   #6
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Is there anything in code about separation of gas and power in underground installations? I know Alberta recommends 300mm separation or a pressure treated 2 X 6 in between.
I still hate the whole 'mm' thing .... Very non-canuck of me i guess

It's a foot !
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Old 09-21-2016, 09:08 AM   #7
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I still hate the whole 'mm' thing .... Very non-canuck of me i guess

It's a foot !
Yep. Box fill in ml? Liters are for milk!
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Old 09-21-2016, 09:14 AM   #8
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Yep. Box fill in ml? Liters are for milk!
Found a ref for book 3 (underground)

  • 6.15.18 states that: Where an underground gas pipe crosses another underground pipe or conduit, a minimum clearance of 2 inches (50 mm) shall be provided either above or below the gas line in accordance with the requirements of section 5.15.
  • Part 1 of the Canadian Electrical Code Rule 12-012 (13) states: For installations not covered by the foregoing requirements of this Rule, the requirements of CAN/CSA-C22.3 No. 7, or the applicable standard, whichever is more stringent, shall apply.

  • Part 3 of the Canadian Electrical Code Rule 6.1.11 states: Where communication and/or supply cables and gas distribution pipelines share the same trench, a 300 mm horizontal separation shall be achieved between the pipeline and the cables.
When sharing a common trench, gas distribution lines must maintain a minimum 300mm (12) separation from electrical communication or supply cables installed within the same trench.
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Old 09-21-2016, 09:17 AM   #9
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Thanks, 'nut .
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