I am interested in having a 3 way transfer switch for 110 v output put into my business, I notice 9 times out of 10 a 110 volts is still available via some outlets during a power failure - with a transfer switch I could keep my server up 90% more without relying on the UPS. I was thinking in terms of having a electrician use a 3 phase square D 15 amp or 20 amp breaker if wire is 12 gauge and go to switch then back to main office plug where computer server is located.

Products like this http://www.aimscorp.net/PWR3AXFER30.htm look interesting but don't mention any certifications - in Canada the product is supposed to be CSA certified or meet certain international approvals to be sold such as I think CE. Aren't similar approvals required in the U.S.

I will check with the site mentioned but am pretty sure I inquired several months ago and they had no approvals. Does anyone know of such light weight 3 way transfer switches with approvals for use.

Ken

I understand the concept of these rapid ATS units, I have purchased and installed similar Liebert units for specific single corded equipment in datacenters.

Lieberts only offered two power source switching, this unit apparently can handle 3 power sources.

They are not a substitute for a UPS.

Here in US we must use equipment tested by a third party testing firm, Underwriters Laboratories is the most popular.

Yes, Canada requires CE label on all electrical equipment. You can confirm with AIMS regarding their testing.

I really must recommend you use a UPS for your server(s) in addition to a redundant power source.