So I was asked by our onsite engineer (civil) what is the minimum size hand hole for a single 1-1/2” conduit (in and out straight through pull) with a 2 hour fire rated wire. Duct bank is 3’ below finished grade. Currently slated for a 2’x2’ quazite style hand hole box.
Are underground boxes same as junction boxes?
1.5”x8=12”?
What is they were to 90 up and out in the hand hole with a U bend?
What size should this box be and what NEC code should we look at. 314.30? Thanks
Note from drawing;
PULL 3#8,1#8G PRYSMAIN LIFELINE 2 HOUR FIRE
RESISTIVE RHW-2 CONDUCTORS THAT MEET
UL2196 TO SOURCE 1 CONNECTION IN FIRE PUMP
CONTROLLER. ROUTE THRU HH-FP-1
Thanks for your help and advice.
Ryan
Are underground boxes same as junction boxes?
1.5”x8=12”?
What is they were to 90 up and out in the hand hole with a U bend?
What size should this box be and what NEC code should we look at. 314.30? Thanks
Note from drawing;
PULL 3#8,1#8G PRYSMAIN LIFELINE 2 HOUR FIRE
RESISTIVE RHW-2 CONDUCTORS THAT MEET
UL2196 TO SOURCE 1 CONNECTION IN FIRE PUMP
CONTROLLER. ROUTE THRU HH-FP-1
Thanks for your help and advice.
Ryan