Hi,
I need to supply electricity to a garage which will be ~20m from the main house CU. It will need to supply power for a freezer, lighting, a pond pump and a few sockets for a workshop (although it is unlikely that more than 2 power tools could be used at the same time!!). The cable will run through a 40mm duct buried ~600mm underground.
In my last house the garage was supplied by a single 4mm2 armoured cable which was usually fine but the garage CU mcb would trip whenever I used a big 9" grinder (no problem from the main house sockets). So the question is what should I do this time? should I use a bigger cable eg 6mm2 (which might be rather difficult pulling through the duct!) or run a ring circuit from the main house CU? Any advice gratefully received.
I need to supply electricity to a garage which will be ~20m from the main house CU. It will need to supply power for a freezer, lighting, a pond pump and a few sockets for a workshop (although it is unlikely that more than 2 power tools could be used at the same time!!). The cable will run through a 40mm duct buried ~600mm underground.
In my last house the garage was supplied by a single 4mm2 armoured cable which was usually fine but the garage CU mcb would trip whenever I used a big 9" grinder (no problem from the main house sockets). So the question is what should I do this time? should I use a bigger cable eg 6mm2 (which might be rather difficult pulling through the duct!) or run a ring circuit from the main house CU? Any advice gratefully received.