IEC cord Rating for 1 Antminer S9 with APW3++ 220v 50hz

[iamrohitkgupta]

I have a 10 amp IEC cord connected to the PSU but it gets hot. I don't have an instrument to read the temperature.
Shouldn't 10 amps be enough at 200v?
Cable is thin though, 0.75 mm².
I don't see any darkening in the cable. Should i be worried?

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[T-Gee05]

For S9, the power consumption is 1323W (13.5TH/s batch).. say 1400W. At 220V supply, load current is 6.4A plus 10% at the wall for efficiency.. so around 7.1A.

Wire size should be 1.5mm² as per NEC wire sizing for 7.1A load. That makes your wire undersize for your load if it is only 0.75mm² that is why it gets hot.

Better get thicker wire size to match your load current and that is 1.5mm² to be safe.

[iamrohitkgupta]

For S9, the power consumption is 1323W (13.5TH/s batch).. say 1400W. At 220V supply, load current is 6.4A plus 10% at the wall for efficiency.. so around 7.1A.

Wire size should be 1.5mm² as per NEC wire sizing for 7.1A load. That makes your wire undersize for your load if it is only 0.75mm² that is why it gets hot.

Better get thicker wire size to match your load current and that is 1.5mm² to be safe.

Okay. Thanks. Im gonna search the local computer hardware store.
Can you give any brand recommendations? I live in India.

[T-Gee05]

For S9, the power consumption is 1323W (13.5TH/s batch).. say 1400W. At 220V supply, load current is 6.4A plus 10% at the wall for efficiency.. so around 7.1A.

Wire size should be 1.5mm² as per NEC wire sizing for 7.1A load. That makes your wire undersize for your load if it is only 0.75mm² that is why it gets hot.

Better get thicker wire size to match your load current and that is 1.5mm² to be safe.

Okay. Thanks. Im gonna search the local computer hardware store.
Can you give any brand recommendations? I live in India.

Im not familiar with the brands you have there but it is similar to this specs

https://www.amazon.com/Omnigates-Power-14AWG-5-15P-Connector/dp/B01DS79UU2/ref=sr_1_16?s=electronics&ie=UTF8&qid=1510800963&sr=1-16&keywords=power+cord++250v+14awg+15a

[NotFuzzyWarm]

Given how very thin power cords are India, Asia, and many other countries best you can look at is the current (amps) rating.

Be very aware a cord's rating is the maximum amount of current that can be safely used FOR A SHORT PERIOD OF TIME not with a constant load. You never ever want to push a cord to max for long periods of time. As you have found out - they get hot.

For loads running 24x7 like miners preferably a cord should be rated for 2x what a miner draws.

Any cord powering miners like the s9 or Avalons need cords rated for at least 13 amps, 15 is better.

[iamrohitkgupta]

Thank you, guys!