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Old 01-18-2019, 06:20 PM   #1
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Working on a car storage facility that has one bay that is a car wash. All they will have is curtains to close of the area when they are washing cars.

Talking to the inspector about this he mentioned section 22, most of it make sense except 22-302. I assume I have to worry about these rules for my conduit.

A few questions regarding these rules
How to arrange your conduit to allow it to drain and what type of fittings allow moisture to drain out.

I will be using either PVC or EMT in the car wash section which has a typical qdeck ceiling. What is the easiest way to maintain the 12mm of clearance that is required.
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Old 01-18-2019, 07:41 PM   #2
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Originally Posted by darren79 View Post
Working on a car storage facility that has one bay that is a car wash. All they will have is curtains to close of the area when they are washing cars.

Talking to the inspector about this he mentioned section 22, most of it make sense except 22-302. I assume I have to worry about these rules for my conduit.

A few questions regarding these rules
How to arrange your conduit to allow it to drain and what type of fittings allow moisture to drain out.

I will be using either PVC or EMT in the car wash section which has a typical qdeck ceiling. What is the easiest way to maintain the 12mm of clearance that is required.
Arranged to drain means not level and don't create plumbing P-traps, give the water a direction to go.
Don't seal the LB's water tight, same as the boxes. I use compression fittings as it stops most of the water that is over sprayed onto the EMT. What little gets in, will drain away..
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Old 01-19-2019, 12:33 AM   #3
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Use a TB or Tee in the low spot on a fitting, with a suitable RE and an ECD15 drain in the bottom opening. Done it lots in the oil and gas world for vertical runs where a larger temperature difference can occur, or before they enter a warm location.
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Old 01-19-2019, 07:54 AM   #4
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Use a TB or Tee in the low spot on a fitting, with a suitable RE and an ECD15 drain in the bottom opening. Done it lots in the oil and gas world for vertical runs where a larger temperature difference can occur, or before they enter a warm location.
First time I ordered one here in Wpg , the wholesaler had no idea what a drain/breather was lol
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Old 01-20-2019, 01:40 PM   #5
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...

Talking to the inspector about this he mentioned section 22, most of it make sense except 22-302. I assume I have to worry about these rules for my conduit.

...

I will be using either PVC or EMT in the car wash section which has a typical qdeck ceiling. What is the easiest way to maintain the 12mm of clearance that is required.
This opens another question that might be relevant. 22-302 relates directly to conduit, not EMT. If you're using EMT it will need 22-200 b) - be rated for wet locations.

That said, i'm not involved with part1 in that way often, perhaps the book mixes EMT and Conduit as well.
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Old 01-20-2019, 02:01 PM   #6
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First time I ordered one here in Wpg , the wholesaler had no idea what a drain/breather was lol
Give him something easy.... Try asking for a sill plate.
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Old 01-20-2019, 02:33 PM   #7
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Give him something easy.... Try asking for a sill plate.
There would be no point in asking for one of those. I don't think anybody in Canada, specially in Manitoba, would be caught dead using service entrance cable.
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Old 01-20-2019, 02:40 PM   #8
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Give him something easy.... Try asking for a sill plate.
....
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Old 01-20-2019, 02:47 PM   #9
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This opens another question that might be relevant. 22-302 relates directly to conduit, not EMT. If you're using EMT it will need 22-200 b) - be rated for wet locations.

That said, i'm not involved with part1 in that way often, perhaps the book mixes EMT and Conduit as well.
Good point. EMT and ENT are not considered conduit although on a job site that is what everyone calls it
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Old 01-20-2019, 06:18 PM   #10
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You can use regular EMT but compression fittings in Ontario for such secnarios
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Old 01-21-2019, 03:07 PM   #11
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Good point. EMT and ENT are not considered conduit although on a job site that is what everyone calls it
There's quite a few odd terminology misuses, definitely complicates discussions between type of people. I always have to clarify when someone tells me to not worry about something because it's low-voltage... :-)

As long as the designer and the orderer knows the difference, that's hopefully all that matters.
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Old 01-24-2019, 10:25 AM   #12
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Here in Saskatchewan there is a Saskpower interpretation for rule 12-1404 b.


No EMT in car wash bays because of corrosive chemicals used. I have seen some badly corroded components in car wash bays.
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Old 01-25-2019, 09:14 PM   #13
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Simple fix, RFIed the owner and he deleted the car wash.
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