hi all
im currently doing some testing on a university the install is metal trunking and metal conduit used as the earth for the whole installation. when we disconect neutral and carry out isulation resistance test we are getting a 12v between live and the earth bar, and our metrel tester wont allow us to carry out the test. does any one have any ideas.
thanks in advance
im currently doing some testing on a university the install is metal trunking and metal conduit used as the earth for the whole installation. when we disconect neutral and carry out isulation resistance test we are getting a 12v between live and the earth bar, and our metrel tester wont allow us to carry out the test. does any one have any ideas.
thanks in advance