Harrington Hoists and Cranes MR Trolley - (MR2) User Manual
Page 25
3.4.8
Connection to Electrical Power Source - The red, blue and black wires of the Power Supply Cable
should be connected to an Electric Power Disconnect Switch or Circuit Breaker. This connection
should be made so that the ER2/NER2 or other hoist is phased properly. Refer to Section 3.6.5 for
instructions on how to check for correct power supply phase connection.
3.4.9
Fuse/Breaker Capacity -The power supply for the trolley and hoist should be equipped with current
overload protection such as fuses, which should be selected for 110% to 120% of total listed full load
amperage, and should be dual element time-delay fuses. Refer to the motor nameplates on the trolley
and hoist for the full load amperage draw of each and added the two values together for the total
amperage.
3.4.10
Grounding - An improper or insufficient ground connection creates an electrical
shock hazard when touching any part of the hoist or trolley. In the Power Supply Cable the ground wire
will be either Green with Yellow stripe or solid Green. It should always be connected to a suitable
ground connection. Do not paint the trolley wheel running surfaces of the beam as this can affect
grounding.
Figure 3-14 Pendant and Power Supply Cable Connection – Product Code ER2/NER2M001H to ER2/NER2M100L
25