[RFI] Galaxy Grow Light Ballast Update

[Jim Brown]

On Mon,2/1/2016 7:50 PM, DWKANEPE at aol.com wrote:
> Just a point of information...a fuse or circuit breaker will NOT and 
> is not intended to prevent electrical shock. 

That is WRONG.

> Ground Fault Circuit Interrupter protection will! 

GFCI's protect against a very different mechanism, namely leakage 
current.  GFCI's sample current in the phase (hot) and neutral 
conductor, and open the circuit if they are out of balance by more than 
6-10 mA, which means that current must be flowing on the Green wire, and 
producing enough IR drop between the Green wire and other grounded 
objects (like plumbing).

> Fuses, breakers and other OCPD's are intended to protect wiring and, 
> in some cases, utilization equipment.

AND human life.

Fuses/breakers protect us in the case of a FAULT -- that is, something 
causes a short between phase and exposed equipment, causing the exposed 
equipment to be hot with respect to ground.

BTW -- I've been paid to TEACH and write tutorials on this stuff for 
more than ten years.

73, Jim K9YC