amperage draw 7.5 hp comp. motor
amperage draw 7.5 hp comp. motor
(OP)
hello. new 7.5 hp compressor motor. trips magnetic switch intermittantly.
-32amp run rated.
-runs at (35amps-235v) . starts at (150amps-205)fuctuates 5-10 %.
-its was (175amps-190v)on start until I ran new wire from fuse box to comp.
-1960 building stucture.old wiring
-is 205v to big of a voltage drop on start. ?????
-or is the comp. drawing to much.???
-capacitors passed ohmn metor test
any suggestions. thanks george
-32amp run rated.
-runs at (35amps-235v) . starts at (150amps-205)fuctuates 5-10 %.
-its was (175amps-190v)on start until I ran new wire from fuse box to comp.
-1960 building stucture.old wiring
-is 205v to big of a voltage drop on start. ?????
-or is the comp. drawing to much.???
-capacitors passed ohmn metor test
any suggestions. thanks george






RE: amperage draw 7.5 hp comp. motor
Starting current of 6-7 times would be considered normal. Your mag-trip must accomodate that. Have you looked at table 430.52 in NEC?
RE: amperage draw 7.5 hp comp. motor
Voltage drop depends on how long it stays down, but it doesn't look bad for short duration.
RE: amperage draw 7.5 hp comp. motor