Metal fittings need grounding in PVC ?

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Stevenfyeager

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United States, Indiana
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electrical contractor
If we use metal threaded fittings in a pvc conduit run, does that cause a problem? In a 2" pvc conduit run, we would like to make part of it liquidtight using metal fittings for each end of the liquid tight. Do these fittings have to be grounded? I can't find plastic connectors. Running from a meter to a house panel. Thank you.
 
Stevenfyeager said:
If we use metal threaded fittings in a pvc conduit run, does that cause a problem? In a 2" pvc conduit run, we would like to make part of it liquidtight using metal fittings for each end of the liquid tight. Do these fittings have to be grounded? I can't find plastic connectors. Running from a meter to a house panel. Thank you.
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With the exception of buried metal bends, yes. Any metal part of the conduit run needs to be electrically continuous with the EGC system.

There is liquid tight plastic conduit, and plastic connectors to go with it. Note that plastic liquidtight is not listed for use with metal connectors and vice versa.
 
Carultch said:
There is liquid tight plastic conduit, and plastic connectors to go with it. Note that plastic liquidtight is not listed for use with metal connectors and vice versa.
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Interesting; those plastic liquidtight connectors are fragile pieces of trash. Though they may not be listed, I've never had it called out when I had to use the metal connectors with plastic conduit. These were of course in situations where the boxes were metallic (to bond the fittings) and an EGC was pulled.



SceneryDriver
 
Do I need to bond a metal locknut when using male adapters into a pvc box?
 
tkb said:
Do I need to bond a metal locknut when using male adapters into a pvc box?
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In reality an inspector could require non-metallic locknuts.

Back to the OP, 250.92, 250.80, and 250.86

Roger
 
kwired said:
Assuming that slab is on grade - they can't run SE cable in that application.
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I meant come out of the meter with pvc to an LB and another piece of pvc into the basement, using that for the seu cable. Then a PVC TA with a ridgid coupling and a SEU connector for the cable. Pretty common around here although sometimes you can get away without it.
 
GerryB said:
I meant come out of the meter with pvc to an LB and another piece of pvc into the basement, using that for the seu cable. Then a PVC TA with a ridgid coupling and a SEU connector for the cable. Pretty common around here although sometimes you can get away without it.
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That is a sleeve for physical protection and not a raceway - if it isn't complete raceway all the way. Such sleeves do not need to be bonded, but would have to contain a cable wiring method and not just open conductors like THWN or XHHW.
 
Stevenfyeager said:
If we use metal threaded fittings in a pvc conduit run, does that cause a problem? In a 2" pvc conduit run, we would like to make part of it liquidtight using metal fittings for each end of the liquid tight. Do these fittings have to be grounded? I can't find plastic connectors. Running from a meter to a house panel. Thank you.
Click to expand...

if you're using metal sealtight than the metal fittings need to be used and a bonding busing on one end. for the simple fact that is how the manufacturers intended use and approved by NEMA. and stuff like that is a saftey thing. 2" sealtight connectors what home depot or other hardware store doesn't carry. both amazon and city electric supply will sell to the public.... there really is no excuse to ignore basic electircal raceway safety, its only code cause somebody or enough somebodies got dead.
 
cloudibew said:
if you're using metal sealtight than the metal fittings need to be used and a bonding busing on one end. for the simple fact that is how the manufacturers intended use and approved by NEMA. and stuff like that is a saftey thing. 2" sealtight connectors what home depot or other hardware store doesn't carry. both amazon and city electric supply will sell to the public.... there really is no excuse to ignore basic electircal raceway safety, its only code cause somebody or enough somebodies got dead.
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They have to usually be special-ordered at Home Depot: https://www.homedepot.com/b/Electri...s/2/Liquid-tight/N-5yc1vZbohkZ1z115oiZ1z117wv

There are plenty of codes that didn't need someone to die first. There are plenty of codes that are political or design issues and not safety. No need to cry wolf for all codes.
 
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