On Wed, 09 Jul 2008 22:38:51 -0500, flipper wrote:

On Thu, 10 Jul 2008 12:36:08 +1000, "Phil Allison"
wrote:


"flipper"


Not true. A normal three wire device has no fuse. The panel breaker
protects it.

The panel breaker does not protect 'devices'. It protects the building
wiring.


** It protects both the installed cabling and any AC supply cabling
associated with appliances.

****WIT.

Wrong, "****WIT."

---
LOL, Phil's right, as usual :-)

Consider:

If a premises' and an appliance's wiring have conductors sized to
carry the normal load current of that appliance with no problem, then
the power that wiring will be required to dissipate will result in a
temperature rise in either which won't present a hazard as far as risk
of fire is concerned.

If, however, because of a fault in the appliance the current through
them (and their attendant rise in temperature) rises to the point
where a fire hazard could become imminent, it's the circuit breaker's
job to disconnect the mains from whatever's causing the problem.

If it's the toaster, or whatever, then the circuit breaker opening up
will disconnect the appliance from the mains and allow the premises
wiring and the appliance's power input cable to cool down to the point
where danger from a fire will be averted.

So, Phil's:

"** It protects both the installed cabling and any AC supply cabling
associated with appliances."

is spot on, wouldn't you agree?

JF