Earthing on the Motor Frame(IEC 60034-1)
Earthing on the Motor Frame(IEC 60034-1)
(OP)
I have read IEC 60034-1 in conjuction with motor earthing. It tells me to be earthed from motor frame in addition to earth tap on the terminal box for motor more than 100kW.
If the bonding is achieved between motor frame and terminal box, the motor frame is still required ?
Can you tell me technical backgound/reason in requiring motor frame earth ? My situation is that only terminal box earth is beneficial for us.
If the bonding is achieved between motor frame and terminal box, the motor frame is still required ?
Can you tell me technical backgound/reason in requiring motor frame earth ? My situation is that only terminal box earth is beneficial for us.





RE: Earthing on the Motor Frame(IEC 60034-1)
RE: Earthing on the Motor Frame(IEC 60034-1)
RE: Earthing on the Motor Frame(IEC 60034-1)
The ground connection inside the terminal box satisfied the NEC or CEC.
Other codes or policies mandated the external frame ground.
One advantage of the external ground connection is that it is readily visible and plant operators can see and report any disconnections or damage.
respectfully
RE: Earthing on the Motor Frame(IEC 60034-1)