Junction box size
- Thread starter PWRUP
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jerryalan
Member
- Location
- Perry, Mi. Shiawassee
- Occupation
- electrician
314.28(A)(2)
No other conductors. Feeders will enter the same side of the box and will be spliced once.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
This may help
- Location
- New Jersey
- Occupation
- Journeyman Electrician
This may help
I have always found this distance C dimension to be silly when you're splicing the conductors together with something like a multi-port, Polaris style connector. IMO it's better if the conduit are right next to each other.
- Location
- Placerville, CA, USA
- Occupation
- Retired PV System Designer
IMHO the C distance only applies to a continuous run of conductor in the first place.
So an attempt to apply it to a spliced or terminated conductor would indeed be silly.
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- Location
- New Jersey
- Occupation
- Journeyman Electrician
Code reference?
Common sense and same Code reference. There's no straight, angle, or 'u' pull involved. The conductors are spliced, i.e. two conductors electrically coupled. Thus the conduit entries do not house the same conductor (which is the C dimension in the graphic).
Carultch
Senior Member
- Location
- Massachusetts
Your graphic did say "enclosing the same conductor". Is a conductor still the same conductor, after it is spliced to another segment?
According to the title, logic says a splice cannot be an angle or u pull and thus spliced conductors cannot be the same conductor.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
So then The graphic that Dennis posted does not apply to the OP?
The A dimension applies, the C does not.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
OK thinking about it I agree unless you want to call the spliced conductors the same conductor.
I'm not... and I hope no inspector does....unless you want to call the spliced conductors the same conductor.
Julius Right
Senior Member
- Occupation
- Electrical Engineer Power Station Physical Design Retired
This is why I'm asking. My intention is to 'H' Tap the conductors together so putting the conduits closer together would make the installation easier and neater.
But reading the NEC makes me think it would need to be distance 'C'.
kwired
Electron manager
- Location
- NE Nebraska
I'm not... and I hope no inspector does.
Same here. Same scenario, but land conductors on a breaker - you often have lesser dimensions on the cabinet then is required for a box containing a U-pull.
Seen many 200 amp breaker enclosures that have line and load raceways leave the bottom that are only about 9 or 10 inches wide.
When the breaker is closed electrically the load side conductor is effectively an extension of the line side conductor, but they are still separate conductor segments that connect to the breaker, splicing device, etc. where a u-pull is hard to say there is more then one conductor (per ungrounded, grounded, line anyway).
Julius Right
Senior Member
- Occupation
- Electrical Engineer Power Station Physical Design Retired
kwired
Electron manager
- Location
- NE Nebraska
That gives minimum distance between centerlines of field made entries, not NEC minimum distance required distances between entries in a pull box.
If you went less then the table in your link says you would physically have troubles making a raceway entry into the box, before you even get to any concerns about pulling conductors.
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