That's why I recommend surge arresters on HVAC equipment. Around here in
the summer months is when we have a lot of thunderstorms and the
darn lightning strikes occur when the AC is running wide open. Voltage
spikes travel a long way from a strike and of course power may cut in
and out a lot so I always install a anti-short cycle timer to protect
the compressor from slamming on and off when under load. Most electronic
thermostats have the timer built in but there are a lot of mechanical
thermostats out there.
Picked up a Dayton cap at local supplier. One that was in it was a
Supco. The Dayton was a lot more expensive than the Supco. Are they
better? I use a Dayton motor on my tablesaw and it is probably 30
years old and still going.
Dayton usually refers to one of WW Graingers in-house brand names. Graingers
list prices are almost always Way To High, and even with their best
corporate discount, it's usually not hard to find a less expensive source.
There is always an easy solution to every human problem -- neat,
plausible, and wrong." (H L Mencken)
I'll bet it was the same last season. What is the tolerance written on it.
What temperature was is. They reduce when warm.
I say replace it. This might work if it's the same voltage rating. From
On Sat, 11 Feb 2012 15:07:50 -0800 (PST), "hr(bob) email@example.com"
On the other hand, if the capacitor IS borderline, and the AC fails
to start on a very hot day next summer, good luck getting a tech to
look at it and fix it in a timely manner. The time to fix it is before
it quits, and when you do not need it.
If you got the right kind of breaker, you can put this attached to breaker
box in parallel with HVAC, and will function whole house also. It can
attach at HVAC also.
This has stranded leads which is somewhat of a problem, you need a breaker
that will work on stranded leads. The last one I had, blew up. I also see
these have a lower clamping voltage than many. I see these on Holmes on
its better to protect HVAC locally. In the main box, you normally use a
dedicated 2 pole breaker.
A motor run capacitor has a leeway of plus/minus 10-15% in
microfarads (generally) without causing any problems with what its
hooked up to. This very low capacity Capacitor would be inexpensive
to replace if it needed it ...and just a matter of 3 push on wires
most of the time.
For the record, I told of me using a surge suppresser, I prefer spike
protector name. Some spike or surge took out my device. I feel fortunate. I
have a new one installed.
A friend in Ohio sort of lives in a rural type area. They have got hit 3
separate times with maybe direct hits. Each time all suppressors were wiped
out, including whole house. Many or most electronic elements were taken
out. After each hit, all wiring was inspected, all suppressors replaced,
grounds inspected, electronic equipment replaced. Just waiting for number
Suppressors will not protect equipment from direct hits. They may help
human safety and help prevent fires.
I was getting worried last fall. Neighbor got hit once each in two separate
storms within a week. Right across street. I don't think her home was
affected, but you should see what it did to a pine tree. The tree exploded
and split half way down. The other tree just looks like half of it died.
She is waiting to see how it holds up. Going to cost a couple thousand to
chop it up.
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