Quote from: du5tin on October 30, 2021, 02:07:47 PM

If you have an electrician friend just let them get all the equipment for you. Be plain about what the end result should be, “I want 10, 30A 240V circuits with receptacles or junction boxes to connect these ten miners.” They should be able to get the right parts for you and often from a distributor with competitive pricing.

A few things with residential services. The power company won’t hook up a 200A panel to 100A service so be sure you can get 200A service before you buy a big panel board. I would also get a physically larger panel too, that way you can install the breakers with a space between them (for cooling) or have room for extra breakers for future.

Quick electrical lesson: breakers are there to protect the wire and not the load. The size of the load (your miner, approx 3000W) dictates the size of the wire (3000W/240V=12.5A, adjust for continuous running; 12.5A/0.8=15.6A so 12 gauge wire minimum) which then directs the size of breaker (12 gauge ampacity is 20A so 20A breaker).

The voltage references can seem a bit confusing. Standard system voltages in North America have some variance. Single phase residential is often 220-240V. I think it also goes back to older electrical standards. Things rated a few decades ago reference 220V or 230V a lot. Most newer standards reference 240V. Long story short is that your power at your place will be in this range, leaning closer to 240V likely. Your power company might be able to adjust your voltage up or down a bit at the transformer using winding taps if you are finding it too low (less than 220V).

Pro tip: you can avoid the cost of larger receptacles by direct splicing the miner cables to the circuit wires. Just cut off the male end, strip back the cable a bit, use a tester to find the ground and power carrying wires in the cable and splice it all in a junction box. It’s more work overall and the cables become fixed to one location but this can save a bit of money. Your electrician friend will be able to help get this right. And definitely get it right because weird things can happen if some wires are accidentally crossed.

PDU is probably not required. They can add value though if you get one with power monitoring and smart switching. If you don’t want to go with a receptacle per miner route or use junction boxes to hook the miners up a PDU is a nice prebuilt way of splitting larger power up to multiple devices. A 30A 240V PDU is only going to be able to power a couple miners though so the added cost might not be worth the benefit if you have to buy a bunch of PDUs.

the cheapest 30a 240v pdu used is this:

https://www.ebay.com/itm/143399400162?

the plug is l6-30p it has 4 breakers for the 4 c19/c20 jacks and a main breaker

it can do 2 s17 on low setting
it can do 2 s17 on normal setting
it can not do 2 s17 on turbo setting

if you buy them look for these wires to run to the s17 psu

https://www.ebay.com/itm/184114573116?

we went away from this setting due to our power having long brown out dips to 188-195 volts. when this happens the pdu would trip

but it is viable way to run s17 gear or even s19 gear

s19 will be 1 unit per pdu.