On 9/15/22 10:55, gene heskett wrote:
On 9/15/22 12:43, David Christensen wrote:
On 9/15/22 05:18, gene heskett wrote:
On 9/15/22 03:04, David Christensen wrote:
On 9/14/22 20:06, gene heskett wrote:
On 9/14/22 19:50, David Christensen wrote:
On 9/14/22 11:40, gene heskett wrote:
I now have added 2 rock64's and killed one old Dell with a
lightning strike since.
I redid the service in 2008, brought it all up to NEC specs, but the
computer and the monitor were
plugged into two different circuits. Jury rigged, fixed now.
Were the two different circuits on the same phase, or opposite phases?
IDK, old house wiring, which is now a 240 volt ct branch of the new 200
amp box. I rarely tear
out a wall just to see the wiring. The house is a 1969-1970 National
prefab, and from looking at it
for 34 years now, the NEC as it existed then, wasn't well followed. The
living room has no
overhead lighting at all, and only two wall switched outlets, both on
outside walls. When I decided
to use this small childs bedroom as a den for my computing, I did run
down the circuit for one
on its inside wall sockets, and soldered everything all the way back to
the pushmatics, then put a huge surge absorbing pluggin strip into that
plug. And a 1500wa ups, so both holes of that duplex are loaded. Almost
everything in this room but the overhead lights and some x10 stuff runs
on that duplex.,
How did plugging the computer and the monitor into two different
circuits affect the outcome of a lightning strike?
Probably on opposite phases. But thats a SWAG at best. Until that, after
the new service in 2008, I'd not had any lightning damages despite the
pole with my can on it being struck multiple times.
Most residential NEMA 5-15R duplex receptacles in USA are fed by one
115~120 VAC circuit, except for the receptacle under the kitchen sink --
it is fed by two circuits: one for the dishwasher and one for the
garbage disposal.
To determine if two electrical outlets are on the same phase or on
different phases, measure the voltage between the hot terminals when the
outlets are energized. If the voltage is around zero, the outlets are
on the same phase. If the voltage is much higher, the outlets are on
different phases.
David
