Topic: Setup Questions - Whatsminer M32 54TH - page 2. (Read 229 times)
I see NEMA 6-20 but they only go as low as 12ga. Can't seem to find any of these power cables online with 10ga. Is it just common practice that with a 8ft power cable that 12ga is acceptable?
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You mentioned that 8ga will be better than 10ga for the connection between the socket and the breaker, but that 10ga is ok for the plug between the socket and the miner. How come 10ga is ok here? Is it simply because the length of the cable here (3-6ft) is significantly shorter than the cable from the socket to the breaker (~40-50ft)?
Bingo. Yes it is only because a cord is usually fairly short. I use www.stayonline.com for all my power cords. They have a huge selection of standard cords usually in-stock and will also make any type of cord you want.
Ok thank you for that voltage insight.
Since I posted I have actually changed the miner I will be purchasing (AvalonMiner 1166 Pro) to one with the following power specs: 3400W, -5%~+8%@Wall-Plug
You mentioned that 8ga will be better than 10ga for the connection between the socket and the breaker, but that 10ga is ok for the plug between the socket and the miner. How come 10ga is ok here? Is it simply because the length of he cable here (3-6ft) is significantly shorter than the cable from the socket to the breaker (~40-50ft)?
I am trying to determine how to go about building or purchasing this power cable (between socket and miner). I know the miner requires a c19 connector. Do you or anyone else have recommendations on where to purchase these, and if so, which one? I see NEMA 6-20P cables available but not any NEMA 6-30P. Do people generally go with 6-20 or is 6-30 overkill here? I have not been able to find much content/guides on anyone building these cables themselves. Thank you.
Since I posted I have actually changed the miner I will be purchasing (AvalonMiner 1166 Pro) to one with the following power specs: 3400W, -5%~+8%@Wall-Plug
You mentioned that 8ga will be better than 10ga for the connection between the socket and the breaker, but that 10ga is ok for the plug between the socket and the miner. How come 10ga is ok here? Is it simply because the length of he cable here (3-6ft) is significantly shorter than the cable from the socket to the breaker (~40-50ft)?
I am trying to determine how to go about building or purchasing this power cable (between socket and miner). I know the miner requires a c19 connector. Do you or anyone else have recommendations on where to purchase these, and if so, which one? I see NEMA 6-20P cables available but not any NEMA 6-30P. Do people generally go with 6-20 or is 6-30 overkill here? I have not been able to find much content/guides on anyone building these cables themselves. Thank you.
No. When it comes to wiring the 80% rule applies only to the current ratings. Voltage de-rating (along with current) really only comes into play for electronic components such as capacitors, diodes, transistors, etc. and that is a whole different animal that depend on a myriad of operating conditions.
The reason is that it is the amount of current flow (amps) through a conductor or device such as plugs, fuses & breakers - not voltage level applied - that creates heat.
I should add that if using wire with TF UF insluation (140-F max temp) and copper wire then technically 10ga wire is fine as my guides say it can carry 30A. Of course 8ga (good for 40A) is better as it will heat up far less. For the cord between the miner and outlet you can use a 10ga one.
Using wire rated for 167-F such as RHW, THHW, THWN or THW then 10 ga copper is rated to carry 35A when it is 3 wires in a cable or conduit.
The reason is that it is the amount of current flow (amps) through a conductor or device such as plugs, fuses & breakers - not voltage level applied - that creates heat.
I should add that if using wire with TF UF insluation (140-F max temp) and copper wire then technically 10ga wire is fine as my guides say it can carry 30A. Of course 8ga (good for 40A) is better as it will heat up far less. For the cord between the miner and outlet you can use a 10ga one.
Using wire rated for 167-F such as RHW, THHW, THWN or THW then 10 ga copper is rated to carry 35A when it is 3 wires in a cable or conduit.
Thank you for the clarity on the 80% rule.
My measured line voltage is the standard USA residential voltage, 2 legs each with 120V. Of course the miner would run off a plug connected to the 40ft of 8ga wire which is configured for 240V. In this case, since not over 250V, NEMA-6 still ok, or does the 80% rule apply to voltage as well?
My measured line voltage is the standard USA residential voltage, 2 legs each with 120V. Of course the miner would run off a plug connected to the 40ft of 8ga wire which is configured for 240V. In this case, since not over 250V, NEMA-6 still ok, or does the 80% rule apply to voltage as well?
The 80% rule applies to all wiring and connectors as well as fuses/breakers.
As for NEMA-7 vs NEMA-6, what is your measured line voltage? If not over 250 the NEMA-6 is perfect. 8ga wire is fine for just 40feet.
As for NEMA-7 vs NEMA-6, what is your measured line voltage? If not over 250 the NEMA-6 is perfect. 8ga wire is fine for just 40feet.
I have a Whatsminer M32-54TH miner arriving soon. I couldn't find a spec sheet on this specific machine but did find a Whatsminer M32-68T spec sheet which was as close as I could find here: https://whatsminer.com/mall/parts/41.html
Anyone know where I can find a spec sheet for this specific machine?
Given the spec sheet showing 3312W +/- 10% I calculate a maximum wattage of 3643W.
Given the spec sheet showing P21D AC200V~277V, and using the 3643W from before, I did 3643W/200V=18.216amps
My understanding is that I shouldn't draw more than 80% of the rated amperage on the breaker, so a double pole 30 amp breaker seems necessary.
I need to run about 40 feet (12 meters) of wiring to an outlet that will be installed for the miner. Using an AWG chart I estimate I will need to use an 8 guage wire for this length. Do I need to make any extra considerations given how long this cable is?
As for the power plug for the miner, the spec sheet shows it need a C19 connector. I am unclear what type of plug to use. Here is the NEMA plug charthttps://www.stayonline.com/product-resources/nema-straight-blade-reference-chart.asp
Do I need the NEMA 7-30 to support 277V and 30amps or would the NEMA 6-20 supporting 250V and 20amps suffice? Does the cable abide by that same 80% rule I referenced earlier, or does that only apply to the breaker? In the case it only applies to the breaker, would I then need the NEMA 7-20 supporting 277V and 20amps? I'm not opposed to making this cable if I need to (I'd prefer to buy it) but I just am unclear on what I need.
Please let me know if these calculations are reasonable and provide any insight. Thank you.
Anyone know where I can find a spec sheet for this specific machine?
Given the spec sheet showing 3312W +/- 10% I calculate a maximum wattage of 3643W.
Given the spec sheet showing P21D AC200V~277V, and using the 3643W from before, I did 3643W/200V=18.216amps
My understanding is that I shouldn't draw more than 80% of the rated amperage on the breaker, so a double pole 30 amp breaker seems necessary.
I need to run about 40 feet (12 meters) of wiring to an outlet that will be installed for the miner. Using an AWG chart I estimate I will need to use an 8 guage wire for this length. Do I need to make any extra considerations given how long this cable is?
As for the power plug for the miner, the spec sheet shows it need a C19 connector. I am unclear what type of plug to use. Here is the NEMA plug charthttps://www.stayonline.com/product-resources/nema-straight-blade-reference-chart.asp
Do I need the NEMA 7-30 to support 277V and 30amps or would the NEMA 6-20 supporting 250V and 20amps suffice? Does the cable abide by that same 80% rule I referenced earlier, or does that only apply to the breaker? In the case it only applies to the breaker, would I then need the NEMA 7-20 supporting 277V and 20amps? I'm not opposed to making this cable if I need to (I'd prefer to buy it) but I just am unclear on what I need.
Please let me know if these calculations are reasonable and provide any insight. Thank you.
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