10-10-2012, 09:14 PM
I'd be inclined to agree, Lawrence. What you want to do is only like running a permanently fitted extension lead.
I THINK that Mark's reason for suggesting a separate spike is Earth Loop Impedance and the lowering thereof. When you start running long cables there's a chance that they'll have a high enough resistance to hold a fault current back to such a level that the fuse won't blow. I can't see any harm in adding one as well as a wire going back to the main system earth - it'd do no more harm than an earthed appliance touching the ground.
- Joe
I THINK that Mark's reason for suggesting a separate spike is Earth Loop Impedance and the lowering thereof. When you start running long cables there's a chance that they'll have a high enough resistance to hold a fault current back to such a level that the fuse won't blow. I can't see any harm in adding one as well as a wire going back to the main system earth - it'd do no more harm than an earthed appliance touching the ground.
- Joe
