Leejosepho
DIY scratch-pad engineer
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If your detached building has no metal connection to the main building, water, gas, conduit, etc, it was acceptable to install only un-grounded and grounded conductors with no EGC. In this case you WOULD bond the neutral to the subs enclosure and the enclosure to the grounding electrode system. This would allow the Neutral to carry ground fault current back to the transformer.
Okay, maybe somebody told me wrong several years ago ... but now I need to run wire to a subpanel in an attached workshop at the back of the garage and house, and I understand that to need four (4) wires and no bonding, correct?
It is, however, required as of 2008 NEC to always run an ECG for an outbulding, (which is always a good idea anyway). Then there will be no issue of wheather bonding is required.
I am a DIY handyman working on my own stuff. What is an ECG?
PS: "ECG" just reminded me of a great brain teaser for nurses: Ask a nurse what an EKG is, and he or she will tell you it is an electrocardiogram (sp?). Next ask what an EEG is, and he or she will say it is an electroencephelogram (sp?). Right after that, ask what an EGG is and you will get a blank stare ... then say it is an egg to be eaten for breakfast.
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