Why is 110V safer than 220V? 3

[Speedy]

Problem goes like this ..........

We are currently using a heating tape (trace) on a flexible tubing. On the prototype machine we were using a 220v tape. We are going to production with the machine and because operators will handle the tubing I have safety concerns eventhough the tape itself is insulated, this in turn is covered with heatshrink.

I discussed this with our in-house electrician who suggested using a 110V tape with a Safety Isolation Transformer.

For my own 'peace of mind' I would like to know why this option is safer. I understand the princible of isolation in the transformer but do not appreciate how it could be safer. After all there is still 110V. I found the following below which explained about
muscle tightening etc.

Apprecaite any comments?



"110vac is a tad safer than 220vac because at 110vac, the
muscles still react to the voltage and go through a spasm which may release your
hold on the conductor. At 220vac, the muscles simply clamp in one direction
predominantly, and grip the conductor."

 

[buzzp]

I for one, am not debating GFI I am debating 120 vs 220.