Daisy Chained Receptacles in Conduit - 310.15(A) ?

[TwoBlocked]

With a box, you may be able to continue the run in the future.

 

[don_resqcapt19]

Don, what about with only a single receptacle on a circuit

The rule specifies multiple receptacles. Not sure a 30 amp duplex exists, so it would be fine for one 30 amp single receptacle.

 

[TwoBlocked]

The rule specifies multiple receptacles. Not sure a 30 amp duplex exists, so it would be fine for one 30 amp single receptacle.

There are 30A 3-phase receptacles, too. And I've seen plenty of portable fans, blowers, vacuums and pumps that are "cord-and-plug-connected" fed that way. Can't recall any where there was more than one off the same OCPD, but could have been, and could have been daisy chained, too.

 

[jap]

There are advantages an disadvantegs to both methods. Boxes require support conduit bodies do not so that's one advantage to not using a box. Since you're already splicing at the receptacles why add more splices at the "T" points. You might save some wire with the boxes but will have more labor.

There is no need to add more splices, and most times you would'nt want to splice in a T anyway.

We're just beating the T up because it came up in a derating discussion.

Jap>

 

[infinity]

We're just beating the T up because it came up in a derating discussion

LoL, beating up the T, I like that.

 

[electrofelon]

. Boxes require support conduit bodies do not

That's a good point

 

[TwoBlocked]

. Boxes require support conduit bodies do not

That's a good point

Even malleable, threaded boxes? 314.23(E)

 

[TwoBlocked]

We're just beating the T up because it came up in a derating discussion.

Jap>

LoL, beating up the T, I like that.

I've gotten beat up for using tees. Made up an array of them a couple times and asked why not just use a trough? It was due to wood fiber. There had been times it got into troughs, and when there was a fire, the fiber in the trough burned up the wiring. There's a time and place for EVERYTHING!

 

[electrofelon]

Even malleable, threaded boxes? 314.23(E)

Take a look at the exception.

 

[TwoBlocked]

Even malleable, threaded boxes? 314.23(E)

Take a look at the exception.

The exception is about conduit bodies. We are talking about boxes here.

 

[TwoBlocked]

Help me out folks, I thought I saw some kind of exception for more than 3 CCC when motor control wiring was in the same raceway as the motor leads. Can't find it now.

 

[electrofelon]

The exception is about conduit bodies. We are talking about boxes here.

Sorry, I misread your post

 

[kwired]

Help me out folks, I thought I saw some kind of exception for more than 3 CCC when motor control wiring was in the same raceway as the motor leads. Can't find it now.

Might not apply to raceways? I though it did myself or maybe it has changed over time. All I can find is in art 376 for wireways. 376.22(B) in 2017 NEC doesn't make you count control conductors in a wireway for ampacity adjustment purposes, they still count towards cross sectional fill though.

 

[TwoBlocked]

Might not apply to raceways? I though it did myself or maybe it has changed over time. All I can find is in art 376 for wireways. 376.22(B) in 2017 NEC doesn't make you count control conductors in a wireway for ampacity adjustment purposes, they still count towards cross sectional fill though.

Thanks! That must be where I saw it.

 

[don_resqcapt19]

Even malleable, threaded boxes? 314.23(E)

 

[don_resqcapt19]

Help me out folks, I thought I saw some kind of exception for more than 3 CCC when motor control wiring was in the same raceway as the motor leads. Can't find it now.

310.15(B)(3) ... Where conductors of different systems, as provided in 300.3, are installed in a common raceway or cable, the adjustment factors shown in Table 310.15(B)(3)(a) shall apply only to the number of power and lighting conductors (Articles 210, 215, 220, and 230). [310.15(C)(1) in the 2020]

 

[TwoBlocked]

310.15(B)(3) ... Where conductors of different systems, as provided in 300.3, are installed in a common raceway or cable, the adjustment factors shown in Table 310.15(B)(3)(a) shall apply only to the number of power and lighting conductors (Articles 210, 215, 220, and 230). [310.15(C)(1) in the 2020]

That will do it! You don't count control or indication.

 

[TwoBlocked]

Even malleable, threaded boxes? 314.23(E)

View attachment 2564848

Or even this, but I am sure there are ones that would work like a tee.:

 

[kwired]

Or even this, but I am sure there are ones that would work like a tee.:

View attachment 2564852

Never seen one with a "side entry". though for like mentioned in OP could have a "feed thru" run and one that immediately elbows down and sort of have same effectiveness.

Have seen round boxes that are explosion proof, and have four cross hubs and a center out the back hub though many those don't really have as much volume as the box pictured here has, because the small volume when I have used them usually limit splices to just EGC's as much as possible

 

[TwoBlocked]