hello ..
I wanna ask about art.310.15 ampacity tables
there are many tables in the code body and annex B as well
why tables in annex B is slightly different ?
relating to the code body tables 310.16,310.18 ,17,19 ,and table 310.15 B 3a
which table can i use for each of these cases
when
1- (5) multiconductor cables ( not of the types mentioned in 310.15 B3a Exceptions) run closed to each other along it's length each have 3 current carrying capacity
where these cables run in :
a) free air
b) in earth
2 - (4) PVC conduits run together close to each other ,each have multi conductor cable consists of (3 wires +N)
a) in free air
b) in earth
3- (5) single insulated conductors run :
1- in free air
2- in earth
I wanna ask about art.310.15 ampacity tables
there are many tables in the code body and annex B as well
why tables in annex B is slightly different ?
relating to the code body tables 310.16,310.18 ,17,19 ,and table 310.15 B 3a
which table can i use for each of these cases
when
1- (5) multiconductor cables ( not of the types mentioned in 310.15 B3a Exceptions) run closed to each other along it's length each have 3 current carrying capacity
where these cables run in :
a) free air
b) in earth
2 - (4) PVC conduits run together close to each other ,each have multi conductor cable consists of (3 wires +N)
a) in free air
b) in earth
3- (5) single insulated conductors run :
1- in free air
2- in earth