Ouch. Wrong plug on several units.

[Anonymous user]

We goofed.

http://www.apc.com/resource/include/techspec_index.cfm?base_sku=SUM3000RMXL2U

Unfortunately, we didn't want the NEMA L5-30P for supply power. And we knew better. 😕

There seem to be no available options for changing the input configuration, even though the back of the unit seems removable (see attachment).

Are there any "unenumerated" options that can be obtained -- the entire supply module for this thing?

[Anonymous user]

Yikes. Looks as if the 3000 won't accommodate a 20A plug at all. Is that right?

We'll have to have our electrical guys do the work. 😕

I love grant processes so much! 😉

[TheNotoriousKMP_apc]

We've had customers who've used a 3k on a 20A outlet without problems, so I assume it wouldn't really matter. I don't understand why the document doesn't explain that in clearer detail.

Anyways, I mean if you're not paying for it, why not make it happen...right?

[Anonymous user]

You're limited to 1800VA if you use a 20A plug. 120v x 80% x 20 = 1800. The reason for 80% is NEC only allows 80% of the rated current for continuous use.

[TheNotoriousKMP_apc]

I would take a look at this K-Base first.

http://nam-en.apc.com/cgi-bin/nam_en.cfg/php/enduser/std_adp.php?p_faqid=184


Then let me know if you have questions beyond that.

[Anonymous user · Accepted solution]

120v x 80% x 30A = 2880. Note, VA != V x A, though it's a good enough approximation for many uses.

We've recycled 3000VA's into lower-power applications with no problems in the past. The "proper" way is to use an L5-30P To L5-20R converter cable with a 20A circuit breaker. I'm not sure APC makes such a product, but Google suggests a competitor does. I'm told that the purpose of the circuit breaker is to guarantee that you're not overloading the 20A connectors, since it is possible to have multiple L5-20 outlets on a larger circuit of some sort, and you could build a situation where the SU3000 is trying to draw more than 16A, and the panel breaker wouldn't break the circuit. Were you to be certain that the circuit was only a 20A circuit, you could possibly use a cable like Stayonline's #6297, but you might want to check with your AHJ first as to whether or not it will pass inspection.