Went on a return service call to today...
breaker was changed 6 months ago same problem
Noise in disconnect
Setup is : 400 amp service with 2-200 amp squ.D main breaker disconnects
2 discounts sit above a trough
Problem is a loud hum.. This disconnect feeds a 200 amp main breaker panel
about 225 feet SER to the basement . biggest load is the electric heat ( hot air)
total load amps at panel 108 amps both legs
heats uses 3 feeds 2 -60amp and 1 -30amp
Unit it self contains 3 -2 pole breakers 60 , 60 ,25
wire was 2 sets of #6 and 1 set of #10
Fun starts: in the heater was a factory jumper that combines the 3 ,2-pole breakers
60,60,25, for use with 1 feed Must be removed when use of more than 1 feed
Not the case here
the 2 #6's were landed on both lugs to the jumper ( Bad Idea)
#10 was used to feed the 20 amp 240v condensation pump outlet (btw tailed with thhn#12) Big NO NO,,,
Both 60 amp breakers found tripped in Main panel
Amp reading went up to 95 amps to load on start up drops to 68
i watched 1 trip my self after a few minutes
watch amps jump on second breaker to trip point
(was carrying full load after first breaker tripped)
My FIX: removed factory jumper landed each pair of #6's to each 2 pole 60breaker
#10 to the 25 amp 2p breaker (removed #12 tails to pump )
New reading 48 amps for each load now no breaking tripping
Back to the garage Disconnect still Humming, @$#% !
out with some rubber pads to try to isolate noise , No go
try new breaker No go
You can feel the vibration on the wire with full load on
Any one got any ideas to shut this drum up?
Call Norm from this old house and shoot a can of great stuff into trough and disconnects?
breaker was changed 6 months ago same problem
Noise in disconnect
Setup is : 400 amp service with 2-200 amp squ.D main breaker disconnects
2 discounts sit above a trough
Problem is a loud hum.. This disconnect feeds a 200 amp main breaker panel
about 225 feet SER to the basement . biggest load is the electric heat ( hot air)
total load amps at panel 108 amps both legs
heats uses 3 feeds 2 -60amp and 1 -30amp
Unit it self contains 3 -2 pole breakers 60 , 60 ,25
wire was 2 sets of #6 and 1 set of #10
Fun starts: in the heater was a factory jumper that combines the 3 ,2-pole breakers
60,60,25, for use with 1 feed Must be removed when use of more than 1 feed
Not the case here
the 2 #6's were landed on both lugs to the jumper ( Bad Idea)
#10 was used to feed the 20 amp 240v condensation pump outlet (btw tailed with thhn#12) Big NO NO,,,
Both 60 amp breakers found tripped in Main panel
Amp reading went up to 95 amps to load on start up drops to 68
i watched 1 trip my self after a few minutes
watch amps jump on second breaker to trip point
(was carrying full load after first breaker tripped)
My FIX: removed factory jumper landed each pair of #6's to each 2 pole 60breaker
#10 to the 25 amp 2p breaker (removed #12 tails to pump )
New reading 48 amps for each load now no breaking tripping
Back to the garage Disconnect still Humming, @$#% !
out with some rubber pads to try to isolate noise , No go
try new breaker No go
You can feel the vibration on the wire with full load on
Any one got any ideas to shut this drum up?
Call Norm from this old house and shoot a can of great stuff into trough and disconnects?
