Posting a message to the forum will remove the above advertisement
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  2. angel While you're here, would you mind checking out our Electrician's Insurance section to see if we could save you a few quid? - Specifically our Van Insurance Deals and Public Liability Insurance Deals. Thanks for supporting the forum! angel

    5% Discount from for ALL members! - Click Here

  3. If you are a trainee and haven’t already applied to join our trainee forum then follow this link The trainee forum is a closed area of the forum where the Forum Mentors will freely share their vast experience within the industry. 

    Dismiss Notice

Discuss UPS - input rating vs output load in the Industrial Electrician Talk area at

Please make sure you checkout our forum sponsors, many do discounts for members and, they keep the forum free to use.
  1. DS53

    DS53 New EF Member

    with a single UPS rated at 8KVA, 230v, stating maximum input current of 44A, would the over current device, cable size etc be based on the 8KVA installed load (the UPS), or, the actual load of 8A, connected to the output of the UPS ?

    this is a fixed installation, supplying computer based loads, PCs, monitors of fixed quantity
  2. MDJ

    MDJ The Muppet Police Forum Mentor

    What does a OCPD do? what does it protect?
  3. Lucien Nunes

    Lucien Nunes Mercury Arc Rectifier Respected Member

    The maximum input of the UPS consists of the maximum connected load, and its own consumption for recharging the batteries which depends on the UPS itself. If you are planning to operate it on a supply of lower capacity than its manufacturers specify, then you would have to allow for the charging load and the connected load, which in this case seems to be much lower than its rating.
    • Agree Agree x 1
Similar Threads - input rating output Forum Date
MCB rating advice is appreciated. Electrical Forum Nov 5, 2018
So simple, so frustrating Electrical Tools and Products Oct 13, 2018

Share This Page

Electricians Directory Post a Domestic Job Post a Commercial Job