Topic: [ANN] Spondoolies-Tech - carrier grade, data center ready mining rigs - page 514. (Read 1260354 times)

Nice.


Is it August yet?

We're getting the ASICs on Tuesday

They cannot deny you a refund, doing so would be unlawful.

This has been stated repeatedly and BFL seems to be giving them now (as they have no choice), but you do have to ask for it.

Also, this isn´t the BFL thread

For miners absolutely, I never argued that point.

For every household in America and every appliance, I disagree.

USA 120v/240v split phase is safer than 220v European single phase.

This point about 240v to all outlets is flawed.  If every home in America and all outlets converted to 240v we wouldn't use split phase at all anymore.

The issue is that stupid people and children do stupid things.  While I believe the stupid people are basically natural selection (society's views are different). I don't think children should be put at an increased risk because of negligent parents/guardians/babysitters.

Yes, it has the same safety but higher efficiency, so it is clearly the right move to go with 240V, especially for miners.

Anyone who is going to use sp30s at home likely needs some electrical work done, so you might aswell get it done properly.

As for all the rest, datacenters normally provide 208V+ and this is the more suitable circuit for your sp30s.

I think you intended to say massive watts.

No we are talking about how the usa is stupid for using 120v.  120/240v split phase is suitable for most common applications and has lower potential voltage to ground=safe.

When you compare wire that is irrelevant, a properly installed 120v vs 240v circuit are equally safe as far as wire is concerned.

We are not talking a 6A draw on a standard circuit.

We are in discussion specifically about the sp30, which needs massive Amps.

It's amperage that determines the wire sizes needed and a 120V system has to transmit almost twice the current (amperage) as a 220v system delivering the same amount of energy (watts). Because ampacity-to-wiresize is basically a square function, the wire has to be roughly four times as large. Otherwise, severe voltage drop will occur over any appreciable distance and more energy will be lost to heat generation due to resistance.


There is no greater safety risk as stated:
If wall outlets all were fed with 240V you'd have the lower current and higher power advantage of the European system and it would be safer too, since each "hot" would still be only 120V from ground (not 240V) which keeps the reduced shock hazard advantage.

Why is this even an issue? Are you chewing on random wires in your house, hoping they are not live and 220V?


Bottom line:

For miners, go with 208V+

Please explain this one, I am anxious to know how you came up with that.

only thing I care about as well , all these power conversations et all are moot with no asics lol

Yes that one specific item is more efficient at higher voltage.  It is probably one of the very few items, and only is because it is designed to work on both voltages. Items that are designed to work with 120v are the same efficiency.  This whole sub topic suggests changing the entire wiring system in the us to 200v+.  From an efficiency standpoint this is hard to justify for a 3% difference in one appliance.


This is the negligible difference that I mentioned.  Most household circuits draw less than 6 amps.  The resistive loss in the wire is barely noticeable.


Differences in safety are far from marginal.  Most electrocutions happen between a hot conductor and ground.  In the European system you have almost twice the potential voltage.

Everyone knows that you should disconnect power before servicing wiring and appliances.  Yet somehow people (including children) by the thousands get electrocuted each year.





The usa 240v system is safer, However if everything in the us was converted to 240, it would be 240v to ground, why would we install an additional conductor and buss bar for everything, just to be safe when the system we have works fine. If that is correct then why didn't Europe do it that way?  For applications that need more power we have a similar system to Europe with 277v to ground 480v across phases.

The safety concern is pure bullshit.

Proper 240V wiring is actually safer than the common 120V......

It doesn't need fixed.  Safety is the reason.  Only a few applications make sense to supply more than 240v. I have worked on electric motors that are 9600v.  This system is flexible to meet requirements while keeping safety in mind.  Thomas Edison lost that battle, how is he relevant?  The power plant has nothing to do with residential voltage. Our power plant makes 347,000v.

PSUs are on average 3% more efficient on voltages above 200V compared to 120V.

This doesn´t even include higher losses through wires at 120V vs higher voltages.

Differences in safety are marginal (and probably nearly nonexistant), how do you get in trouble with "safety" on properly connected wires anyway?


It should be clear that the breakers should be switched off when you do any kind of maintenance on your wiring and open appliances....

This even suggests that the 240V system would be safer if installed properly.

Liked what?   

Agreed


the efficiency difference between 120v and 208/220/240 does exist, but is hardly worth mentioning.  As far as logic goes, I think the reason is very logical.  120v 240v(split phase) 208v (3 phase) is safer than 220 single phase.  A insignificant loss in efficiency for increased safety, seems logical to me. While still having the 240v available for higher demand loads but in a safer way than europe adds versatility.


Absolutely, but not for the reasons you mention.  My main consideration would be more power over the same wire.  Less material and labor for the same kw.

@spondoolies
Are the chips already in hand?

I liked it a lot.

Pls, this is totally offtopic, anyone is grateful to tesla but please not on the spondoolies thread.

It hurts both my eyes and my hand when I need to scroll down for hours....

120V is inefficient and has greater losses (on virtually any appliance), but Americans aren´t known for their overly logical approach to many issues, so yeah.

If you are planning on installing some new circuits in your hosting site, better make them 208V or 230V ones, as to give your miner the maximum performance (and save some additional % on electricity).

They will not fix that as it makes the gov and monopolistic utilities too much money.