11-02-2015, 07:36 AM
Al, your arrangment guarantees that the chassis of any "live chassis" set will be at 120V wrt earth. Connecting any earthed testgear to such kit will cause a direct short.
Just plain dangerous.
As Mark says, the best geenral protection for a workbench is an RCD. Use an isolating TX only when you need to conenct earthed testgear to live chassis kit.
I have a dual socket on the output of my iolsating TX but would never use it to feed 2 separate bits of kit. It's currently in use with one socket feeding the heater chain of a live chassis TV. The other is feeding a variac which is supplying HT for the same TV. I've made sure that the polarities are all correct as inadvertantly getting the neutrals to the variac and TV wrong would be unpleasant.
Just plain dangerous.
As Mark says, the best geenral protection for a workbench is an RCD. Use an isolating TX only when you need to conenct earthed testgear to live chassis kit.
I have a dual socket on the output of my iolsating TX but would never use it to feed 2 separate bits of kit. It's currently in use with one socket feeding the heater chain of a live chassis TV. The other is feeding a variac which is supplying HT for the same TV. I've made sure that the polarities are all correct as inadvertantly getting the neutrals to the variac and TV wrong would be unpleasant.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
