Hello,

I'm somewhat familiar with the use of different electrical metal
conduits (e.g. RMC and EMT), but I'm wondering what additional
procedures are required when making up connections outdoors. A few
questions:

1) For an overhead connection to a box (enclosure), a hub is typically
held onto the top of the box by 4 screws. Is the mating of the two
metal surfaces raintight, or is an additional washer or silicone
needed between the two surfaces?

2) For a threaded RMC connection, is any silicone or other thread
sealant required?

3) When making an RMC connection to a knockout at the bottom of a box
(enclosure), is the use of two locknuts sufficient, or is a
different termination fitting required?

Thanks, Wayne

There is typically no gasket because the metal of the box has a slightly
raised collar that fits under the hub. water would run around the collar
rather than into the enclosure
No sealant is used for threaded pipe
Two locknuts is fine for the bottom of the enclosure, be sure to use a
threaded bushing



"Wayne Whitney" wrote in message
...
Hello,

I'm somewhat familiar with the use of different electrical metal
conduits (e.g. RMC and EMT), but I'm wondering what additional
procedures are required when making up connections outdoors. A few
questions:

1) For an overhead connection to a box (enclosure), a hub is typically
held onto the top of the box by 4 screws. Is the mating of the two
metal surfaces raintight, or is an additional washer or silicone
needed between the two surfaces?

2) For a threaded RMC connection, is any silicone or other thread
sealant required?

3) When making an RMC connection to a knockout at the bottom of a box
(enclosure), is the use of two locknuts sufficient, or is a
different termination fitting required?

Thanks, Wayne

Thanks RBM for all the info. Sounds like other than using a hub when
required, using RMC outdoors is the same as using it indoors.

Cheers, Wayne