One of those transistorized device that requires protection
is the GFCI. What protects a GFCI? Just another reason for a
'whole house' protector.

"CL (dnoyeB) Gilbert" wrote:
circuit breakers/fuses protect wiring (and by doing so protect from
'thermal incident' so I'm not disagreeing with you)
GFCI protect humans
Surge protectors/noise surpressors/filters/etc. protect devices

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Respectfully,

CL Gilbert