slip risers

[mditzler13]

When should slip risers be used?

 

[Dennis Alwon]

Is a slip riser an expansion joint?

 

[infinity]

Is this for 300.5(J)?

300.5(J) Earth Movement. Where direct-buried conductors,
raceways, or cables are subject to movement by settlement
or frost, direct-buried conductors, raceways, or cables shall
be arranged so as to prevent damage to the enclosed con-
ductors or to equipment connected to the raceways.
Informational Note: This section recognizes “S” loops in
underground direct burial to raceway transitions, expansion
fittings in raceway risers to fixed equipment, and, generally,
the provision of flexible connections to equipment subject
to settlement or frost heaves.

 

[shortcircuit2]

example ...

https://www.ew-ct.com/thomas-betts-...MI9qqTzNbM3AIVirXACh2xrgelEAQYASABEgIukPD_BwE

 

[electrofelon]

When should slip risers be used?

Not sure if you are questioning slip risers vs expansion couplings, but I typically make my own slip riser out of 2 1/2 which is what the ones you buy are made from.

 

[jap]

What do you all use those for?

Water drainage?


JAP>

 

[jap]

if it is for water drainage, that's a good idea.

I've had services where the ground level at the utility pole was higher than the meter base.

Power companies around here used to bring the pipe up the pole and leave it open at the top.

I guess a lot of meter bases were flooding, cause now they put weatherheads on top of the stubups.


JAP>

 

[electrofelon]

if it is for water drainage, that's a good idea.

I've had services where the ground level at the utility pole was higher than the meter base.

Power companies around here used to bring the pipe up the pole and leave it open at the top.

I guess a lot of meter bases were flooding, cause now they put weatherheads on top of the stubups.


JAP>

I dont really have specific uses for slip risers over expansion couplings, its kinda just habit that I use slips on resi services. I guess the water flowing out is nice, although the bottom of the meter or panel is not watertight so I dont see how it can flood.

 

[Dennis Alwon]

I don't understand why the op hasn't responded. I approved his post within minutes of it being posted and he's gone. Oh, well I guess he won't get his answer.

 

[peter d]

When should slip risers be used?

Anywhere there's extreme temperature changes and the potential for frost heaves or ground settling.