capacitor???

[allenwrench]

Ok, I came up on a unit that had a dual cap 60/7.5 Do not have this on truck. was told to use bigger and not smaller when you dont have the right size. I put on a 60/10, will it be ok or should I have put a 60/5 on it. Which is better?? There was no possible way to get the right capacitor it was after hours call and was told to use what I had, just wondering which is better in this situation?

[SBKold]

did you have just a 7.5?

[TACKERDOWN]

60/10 ok , correct it tomorrow. Do a search on caps on this sight it will give you all the info you need.

Sent from my PC36100 using Tapatalk 2

[beenthere]

Ok for overnight/weekend. Should return with correct size.

[AllStateTech]

Remember you can always go +/- 10% on caps yet you dont know if someone already did that so as beenthere said i would go back with the right one when possible. It is always best to oversize by 10% as it gives you more leway but make it work.

[austinsaysay]

on older machines i will sometimes use a larger capacitor just to give it a little more kick. But only when the correct size is having a hard time starting the motor or capacitor. Then theres the hard start. But just depends on situation. You made the right move, but if the unit is in decent condition i would go back with the correct size asap to avoid any question of you being the cause for it going out later on.

[socotech]

Ok for now but I would go back and correct it.

[SBKold]

I would have put a 60/5 that I carry only wired to herm and a seperate 7.5 mounted professionally in control panel.

Move on and move forward.

[Mr Bill]

Remember you can always go +/- 10% on caps .

Please show me were you got this information. :eek2:

[54regcab]

I would have put a 60/5 that I carry only wired to herm and a seperate 7.5 mounted professionally in control panel.

Move on and move forward.
+1

[ryan1088]

Please show me were you got this information. :eek2:

Bill this is good for the person who likes to come back and put motors on things they just worked on!

Good luck answering that question of why it died shortly after you left.

[timebuilder]

Remember you can always go +/- 10% on caps yet you dont know if someone already did that so as beenthere said i would go back with the right one when possible. It is always best to oversize by 10% as it gives you more leway but make it work.

Let's clear this one up for others reading this thread.

The proper cap value (in microfarads) is the only value to be left there on purpose.

A cap value can vary from it's label value by 10%, but when I find them more than 5% off of label, I replace them.

You cannot choose a permanent replacement cap that has a label value that is 10% off the intended value of the cap for that application.

Now that we are done with microfarads, let's review the voltage question. You CAN replace a 370 volt cap with a 440 volt cap, and leave it there permanently. The increased voltage rating only means that the cap is designed to withstand a higher voltage, so it will typically be more durable than a 370 volt cap.

By the same token, you do NOT permanently replace a 440 volt cap (where one is required) with a 370 volt cap. That's like asking for a callback.

Any questions?

[socotech]

I don't understand why supply houses even still sell 370v caps. I only stock 440v on my truck.

[54regcab]

I don't understand why supply houses even still sell 370v caps. I only stock 440v on my truck.

Because the 370v is cheaper.
Our local supply houses carry American made caps and the Chinese stuff. The American caps last longer bit cost more. Saving a callback is worth a few more bucks per cap IMHO.

[timebuilder]

Because the 370v is cheaper.
Our local supply houses carry American made caps and the Chinese stuff. The American caps last longer bit cost more. Saving a callback is worth a few more bucks per cap IMHO.

And the 370 volt Chinese cap is cheapest of all!

[JBM1000]

I personally do an under load value reading to get what uf it really is doing and then match that as close as plausible using the 2652 x amps divided by loaded voltage.

[Paul Bee]

Go to www.packardonline.com click on packard capacitor e training a good program on how capacitors work and why they fail.

[timebuilder]

I personally do an under load value reading to get what uf it really is doing and then match that as close as plausible using the 2652 x amps divided by loaded voltage.

That will work for (pardon this pun) the CURRENT situation.

However, if that current is not representative of the current the unit should be drawing (say, with a motor that is new, compared to one with a foot in the grave) then the cap would not be correct.

I always replace the cap with the correct value for that system, and go from there. I will only "get creative" if there is no marking on a cap I have to replace, then I will use the formula.

[Kevin Weaver]

Remember you can always go +/- 10% on caps yet you dont know if someone already did that so as beenthere said i would go back with the right one when possible. It is always best to oversize by 10% as it gives you more leway but make it work.

10% of 7.5 = .75... 7.5+.75 = 8.25 10 too big!!!!