Box Connectors
- Thread starter stevej
- Start date
- Status
allenwayne
Senior Member
Off hand I would have to say no, why go that route just chip a little bit of concrete away from the pipe cut the PVC and use a MA.
300.15 Boxes, Conduit Bodies, or Fittings ? Where Required.
A box shall be installed at each outlet and switch point for concealed knob-and-tube wiring.
Fittings and connectors shall be used only with the specific wiring methods for which they are designed and listed.
Where the wiring method is conduit, tubing, Type AC cable, Type MC cable, Type MI cable, nonmetallic-sheathed cable, or other cables, a box or conduit body shall be installed at each conductor splice point, outlet point, switch point, junction point, termination point, or pull point, unless otherwise permitted in 300.15(A) through (M).
(A) Wiring Methods with Interior Access. A box or conduit body shall not be required for each splice, junction, switch, pull, termination, or outlet points in wiring methods with removable covers, such as wireways, multioutlet assemblies, auxiliary gutters, and surface raceways. The covers shall be accessible after installation.
A box shall be installed at each outlet and switch point for concealed knob-and-tube wiring.
Fittings and connectors shall be used only with the specific wiring methods for which they are designed and listed.
Where the wiring method is conduit, tubing, Type AC cable, Type MC cable, Type MI cable, nonmetallic-sheathed cable, or other cables, a box or conduit body shall be installed at each conductor splice point, outlet point, switch point, junction point, termination point, or pull point, unless otherwise permitted in 300.15(A) through (M).
(A) Wiring Methods with Interior Access. A box or conduit body shall not be required for each splice, junction, switch, pull, termination, or outlet points in wiring methods with removable covers, such as wireways, multioutlet assemblies, auxiliary gutters, and surface raceways. The covers shall be accessible after installation.
Sure it's OK. However, you didn't say the conduits contain wires... and if so, whether or not they are or can be energized. :grin:stevej said:
I personally don't see a problem with it. After all, it's done all the time with conduits coming up into open-bottom switchgear, transformers, and the like.
However, a 4sq extension would be much easier to move than equipment weighing in at several hundreds if not thousands of pounds... and extension rings don't have much material left in the back for securing. I would rather see a punched-back 4sq or 4-11 box, preferably a stamped box rather than a welded one, with at least two solid anchors in opposing corners.
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paul
Senior Member
- Location
- Snohomish, WA
stevej said:
No code article.
mvannevel
Senior Member
- Location
- Hesperia, Michigan
Offhand, I can think of several reasons not to do it this way.
The U.L. White Book lists Box extensions for "extending properly secured flush or surface mounted boxes". So, 110.3(B) comes into play. You're not extending a box here, you're using the box extension as a box.
314.17(B) requires that raceways be secured to metallic boxes. Nothing to secure it to with the box extension.
352.48 tells us that a joint between pvc conduit and a box must be made by an approved method (this one will be up to your AHJ, but I don't see it as acceptable).
300.15 requires a box at each junction point, termination point, or pull point. Again, this is an extension, not a box.
So,
The U.L. White Book lists Box extensions for "extending properly secured flush or surface mounted boxes". So, 110.3(B) comes into play. You're not extending a box here, you're using the box extension as a box.
314.17(B) requires that raceways be secured to metallic boxes. Nothing to secure it to with the box extension.
352.48 tells us that a joint between pvc conduit and a box must be made by an approved method (this one will be up to your AHJ, but I don't see it as acceptable).
300.15 requires a box at each junction point, termination point, or pull point. Again, this is an extension, not a box.
So,
I'd say no.
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- Location
- Bremerton, Washington
- Occupation
- Master Electrician
A 4S box and switchgear are not the same (article) and the rules for one can't be used for the other.
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