Capacitor charge time ballpark


Old 06-23-16, 08:45 AM
jjrbus's Avatar
Thread Starter
Join Date: May 2010
Location: US
Posts: 325
Received 1 Vote on 1 Post
Capacitor charge time ballpark

I have an RV with a 120 volt, 11000 BTU roof air that has had a hard start capacitor added to it.

I know there are instruments and calculations to figure this out, but I do not know how many farads the capacitor is, it was added to be able to start the ac with a small generator..

All I need is a ballpark figure, you know does it take the capacitor 30 seconds to reach full charge or does it take 3min, five min. It is plugged into a 20 amp 120 V house receptical at the moment.
Sponsored Links
Old 06-23-16, 09:51 AM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 59,085
Received 1,110 Votes on 1,030 Posts
A capacitor connected across a 120vac line is constantly charging and discharging.... all under one second.

I believe it's charged in 1/30th of a second and discharged in the second 1/30th of a second for 60hz AC power.

A hard starting cap would need to be placed in the compressor start line.... not across the main power line to the A/C.
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: