# Clarity on Elite Power Supply Vacuum Relay **URL:** \ **Category:** Elite Series (Masso & Redline) (Gen 1)\ **Created:** [April 5, 2025, 2:25pm UTC](https://forum.onefinitycnc.com/t/clarity-on-elite-power-supply-vacuum-relay/32232 "2025-04-05T14:25:06Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![cyberreefguru](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/cyberreefguru/32/27385_2.png) [@cyberreefguru](https://forum.onefinitycnc.com/u/cyberreefguru)\ **Post date:** [April 6, 2025, 2:18pm UTC](https://forum.onefinitycnc.com/t/clarity-on-elite-power-supply-vacuum-relay/32232/2 "2025-04-06T14:18:56Z")
I don’t have an official answer for you, but the receptacle on the US power supply is NEMA 5-15R, which means 120V @ 15A, but the fuse is only rated at 10A ([Elite Masso Power Supply Fuse Schematics FAQ](https://forum.onefinitycnc.com/t/elite-masso-power-supply-fuse-schematics/19897)) as you indicated. I’ve seen this a lot where the receptacles are only rated for 10A even though they use a 15A standard. In fact it’s actually quite difficult to find a **reasonably priced** receptacle that is actually rated at 15A and even more difficult to find one at 20A. Based on a [different thread](https://forum.onefinitycnc.com/t/safe-to-switch-us-elite-to-220v/24166/2), it looks like the vacuum is solid state with an [MOV](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/9/5/95768722c6a4e41e79d50e99dc6a00f90e9914b0.jpeg) across the supply line. I can’t see the part number for the FET (or TRIAC) but I’m guessing it’s not rated for 20A based on the size and the lack of a heat sink other than the copper on the PCB and the via stitching. If you are adventurous, given the power supply has a fuse, you could try it out and if you fry the fuse simply replace it? Hope this helps. -Tom --- _[View the full topic](https://forum.onefinitycnc.com/t/clarity-on-elite-power-supply-vacuum-relay/32232)._