Long before computers existed in homes, why were LED clocks
and radios replaced daily? Because switch generated
transients were and remain destructive? Why are RCDs and
dimmer switches - things more easily damaged and without any
external protection - also failing daily? Because again those
transients from switching are so destructive. Put some
numbers to those switch generated transients. Some who
promote utility switching as a source of destructive transient
never provide numbers and ignore those above real world
examples. They are promoting junk science made obvious by
their fear of numbers and a shortage of weekly examples. We
can see from dialy damaged electronics equipment that those
transients are so destructive.

You are replacing RCDs daily because of daily utility
switching and the resulting transients? We also don't put
umbrellas over that RCD because rain also does not damage the
RCD. Why install protection when sufficient protection
already exists?

Utilities are reconfiguring their grids every month for
maintenance, reconfiguring loads, and adjusting voltages.
Transients from such events can be seen sometimes as often as
daily. So where are all those damaged refrigerators?
Transients are well below what all appliance must be designed
to withstand without damage.

We install surge protection for a so destructive surge more
typically known as lightning. Other far less frequent events
do occur. Unfortunately some people confuse blackouts and
brownouts with surges. Surge protectors do nothing for a
blowing fuse or a utility line snapped by a construction
machine. Furthermore, destructive transients of all types
are made irrelevant by the less expensive and more effective
'whole house' protector.

David Maynard wrote:
w_tom wrote:
Yes, utility switching does cause transients. But nothing
that should overwhelm internal protection in household
appliances.

Except that it can and sometimes does.

If switching transients were so destructive, then
we all would be replacing RCDs, dimmer switches, and clock
radios weekly. Once numbers are applied to those switching
transients, then those transients become irrelevant.

That's as illogical as saying if lightning strikes were so
destructive we'd be replacing RCDs, dimmer switches, and
clock radios every time it rained.

Neither are 'destructive' till the relatively infrequent
occurrence when they are.