Gorman-Rupp Pumps SM4G1-X30 460/3 1002211 thru 1241783 - Manual (Page 17)

OM−04461 CONTROL BOXES
TROUBLESHOOTING PAGE D − 2
ELECTRICAL TESTING
Be certain to refer to the wiring diagram(s)
in the Installation Section of this manual be-
fore reconnecting any electrical compo-
nents which have been disconnected.
Test Equipment
A volt/amp/ohmmeter and megohmeter of ade-
quate range and quality will be required to conduct
the electrical tests. The suggested equipment indi-
cated below is commercially available, or an equiv-
alent substitute may be used.
Equipment Use
Ammeter/
Voltmeter To check AC Voltage
and current (amperage)
Ohmmeter To measure resistance
(ohms) to ground
Voltage Imbalance
Each phase of the incoming three-phase power
must be balanced with the other two as accurately
as a commercial voltmeter will read. If the phases
are out of balance, contact your power company
and request that they correct the condition.