Bonding requirement for a conduit body splice

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Coppersmith

Coppersmith

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Tampa, FL, USA
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Electrical Contractor
314.16(C)(2) says I can splice in a conduit body (assuming I meet the requirements). However, there is not a place to bond the ground in the conduit body. Is bonding required? if so, how is it accomplished?
 
If you using mettalic conduit is bonding required even though you are splicing inside.
I would think you drill a hole on the back wall of the conduit body and tap it & use a 10-32 screw. But it can be any machine screw.
 
Coppersmith said:
314.16(C)(2) says I can splice in a conduit body (assuming I meet the requirements). However, there is not a place to bond the ground in the conduit body. Is bonding required? if so, how is it accomplished?
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If you're referring to 250.148 where you would connect the EGC to a metal box that section does not apply to conduit bodies.
 
infinity said:
250.148 ... that section does not apply to conduit bodies.
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I don't see an exception for conduit bodies in this section or any other related to conduit bodies.

I'm concerned because the section of conduit (about 30 ft) with the splice is isolated on both ends by liquidtite conduit and mounted on wood so is not bonded anywhere. If the ungrounded conductor were to contact the inside of the conduit body, it would be a shock hazard. Regardless of the requirement, can I do what Edward said and tap the conduit body for a ground screw?
 
Coppersmith said:
I don't see an exception for conduit bodies in this section or any other related to conduit bodies.

I'm concerned because the section of conduit (about 30 ft) with the splice is isolated on both ends by liquidtite conduit and mounted on wood so is not bonded anywhere. If the ungrounded conductor were to contact the inside of the conduit body, it would be a shock hazard. Regardless of the requirement, can I do what Edward said and tap the conduit body for a ground screw?
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You are required to bond isolated metallic conduit whether you splice in conduit body or not. Say you didn't have a condulet installed, just line voltage wiring passing through 30' of isolated conduit. If the hot were to come in contact with the metallic conduit, where is your ground fault current path to facilitate opening the breaker?
 
Coppersmith said:
I don't see an exception for conduit bodies in this section or any other related to conduit bodies.

I'm concerned because the section of conduit (about 30 ft) with the splice is isolated on both ends by liquidtite conduit and mounted on wood so is not bonded anywhere. If the ungrounded conductor were to contact the inside of the conduit body, it would be a shock hazard. Regardless of the requirement, can I do what Edward said and tap the conduit body for a ground screw?
Click to expand...

The metal conduit body is required to be connected to an EGC typically by a metallic raceway. If the raceway is non-metallic then you will need another means to connect it.
 
If you are pulling straight through a conduit body or metallic box for that matter without any splices do you still need to bond the equipment grounding conductor to the box or conduit body?
 
Mustwin351 said:
Thats what I had thought but was having trouble finding the relevant code section. Any idea of where that is at?
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250.148 Continuity and Attachment of Equipment
Grounding Conductors to Boxes. Where circuit conductors
are spliced within a box, or terminated on equipment
within or supported by a box, any equipment grounding conductor(
s) associated with those circuit conductors shall be connected
within the box or to the box with devices suitable for
the use in accordance with 250.148(A) through (E).
 
The conduit body assumes that you are using a metallic conduit where it will be automatically bonded. We get that!!

But when a nonmetallic raceway is used with a metallic conduit body, As I had mentioned earlier, drill a hole on the back wall and tap it and use a machine screw. I would use a 10-32 since it is most common, but you can use any other size. Then that becomes your bonding location.
 
jumper said:
250.148 Continuity and Attachment of Equipment
Grounding Conductors to Boxes. Where circuit conductors
are spliced within a box, or terminated on equipment
within or supported by a box, any equipment grounding conductor(
s) associated with those circuit conductors shall be connected
within the box or to the box with devices suitable for
the use in accordance with 250.148(A) through (E).
Click to expand...
That rule was adopted as the same applied to conduit bodies...
 
I know this has noting to do with your question but I'm just curious.............

How many wires are you splicing in the conduit body and what size is it? You typically need to be using a much larger raceway than required or at least increase the conduit body size to meet the minimum space requirements. A 1/2" conduit body is around 4.5 cu. 3/4" around 7 and 1" around 12. You would need a 1" conduit body to splice a 2-wire 20 amp circuit (4-#12 wires plus EGC).
 
Are metal conduit bodies rated for use with PVC conduit? Looking at manufacturers I only see threaded metal conduit bodies listed for use with RMC and IMC. Why not just use a PVC one?
 
lauraj said:
Are metal conduit bodies rated for use with PVC conduit? Looking at manufacturers I only see threaded metal conduit bodies listed for use with RMC and IMC. Why not just use a PVC one?
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I assume the condulet is in a run of metal conduit. I certainly wouldn't install a PVC condulet in the middle of a metal conduit run.
 
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