M
mort2376
The factory I look after has just taken delivery of a new Cnc machine.
I was there today to wire it up, no problems 4core 10mm swa done.
The filter said that the machine needs a separate earth bond to the structural steel work. I said that's not my problem as its part of your installation as agreed. However I have a feeling I am going to end up doing it.
Before I left I did a quick check and measured from MET to the steelwork and got a reading of 60ohms, so I am guessing that the steel is not bonded ( factory is over 100 years old and space is rented )
I am not happy that they are going to bond to the steelwork with such a high difference between the MET and there. Why does the machine need a separate bond ? It is earthed through the swa. Has anyone else come across this ? I have searched the net and found lots of info regarding it from the USA but cannot find definite answers.
Any help advice is appreciated.
I was there today to wire it up, no problems 4core 10mm swa done.
The filter said that the machine needs a separate earth bond to the structural steel work. I said that's not my problem as its part of your installation as agreed. However I have a feeling I am going to end up doing it.
Before I left I did a quick check and measured from MET to the steelwork and got a reading of 60ohms, so I am guessing that the steel is not bonded ( factory is over 100 years old and space is rented )
I am not happy that they are going to bond to the steelwork with such a high difference between the MET and there. Why does the machine need a separate bond ? It is earthed through the swa. Has anyone else come across this ? I have searched the net and found lots of info regarding it from the USA but cannot find definite answers.
Any help advice is appreciated.