Can I use a submersible pump 220v Canada in Asia 220v?

Now I ask, how can the Philipines 220V ac be supplied by a single wire? Nowhere on earth would a single phase with earth return circuit be allowed for ac mains supply voltages. There must be a LINE wire (active phase) and a separate NEUTRAL return wire.

I'd love to know how the Philipines have managed to deliver electricity down one wire !

Can you elaborate slightly ?

Graham

You kids have it so EASY. Why, when we were young, our AC power came on just one wire!

I'm still wondering how they measure the voltage.

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Yeah, don't we :-)

I'm not what you would call a "kid" though - been around a while.

Of course, power companies do construct rural power distribution systems using single wire earth return (SWER) to save on conductors. Consumers are isolated from that system by a distribution transformer which converts it to a 2 wire isolated supply.

Any idea how the feeders are set up at the substation? I would guess the substations would only receive one phase, but do they stick the neutral to ground?

Sorry, I'm not a specialist. The electric company in the Philippines provides with 2 wires, one black and one neutral. My pump from Canada comes with 3 wires, one black, one red, and one green. The pump is 230 v, 60 hz, 1 ph. On my meter in the Philippines it is 220 v, 60 hz, 1 phase. I think I should connect the green from the pump with the white neutral. But what should i do with the black and red from the pump? Connect only the black from the pump to the black line wire and no connection to the red. Or connect the red and the black from the pump to the single black line wire? Please help, I don't want to damage this expensive pump. Thanks

In North America, green is used for ground AKA earth. When the two non-ground wires are red and black, I believe black is neutral and red is "hot." All this would mean that green should be connected to a good ground, your pump's red wire to the electric company's black, and your pump's black wire to the electric company's white. However, I think you should look for more confirmation and not just go with my say-so, especially as it's an expensive pump.

So long as the voltage between the two wires is within the pump's range of operating voltages, you won't damage the pump, but electrical safety might be a issue.

The earth/ground connection is there to short the power in the event that any exposed conductor becomes live. Even if the pump has no exposed metal, the water in which it is submersed could become live if the pump were to leak.

I strongly suggest asking someone familiar with the local electricity system about grounding. If in doubt, add an isolating transformer and a residual current device (RCD, aka ELCB, RCCB, GFCI, ALCI), i.e.:

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Has to be single phase - that's why it is called SWER, and yes, N is earthed at substation.

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It is not usual to feed a submersible pump via an RCD. The pump should be fed using a circuit breaker with adjustable current and thermal overload tripping.

Here is a typical instruction manual for submersible pumps (both 3 ph and 1 ph) as used in Australia on 240V MEN system.

Note that the first wiring diagrams should be headed Three Phase and not Single Phase (publisher oversight). The pdf contains tables for current for various size motors so that you can select and set a suitable circuit breaker.

Boo-boo........

P.4 shows 3 wire single phase pumps. The additional wires are to connect the start capacitor in the motor control unit.

You believe. Perhaps you shouldn't answer questions relating to 240V electricity until you *know*. Especially when what you believe is totally incorrect, and dangerously so.

In North American power wiring, black is *never* neutral. It is *always* hot. Neutral is *always* either white or gray. When black and red wires are present, typically they are *both* hot with a 240V potential between them.

Especially as you don't know what you're talking about.

No. The green wire should be connected to earth ground.

Connect one to black and the other to white. Doesn't matter which way.

Your Canadian pump has two hots (black and red), a ground (green), and no neutral. In North American power distribution - same is true in Canada, U.S., and (to the best of my knowledge) Mexico - uses a three-wire system in which 240V is supplied from a transformer with a center tap which is strapped to ground. The two hot conductors have a 240V potential between them - the black and red wired to your pump - and a 120V potential to neutral and to earth ground.

Power distribution in the Phillipines - from your description; better consult a local electrician to be sure - is evidently distributed as 240V over two wires: one neutral which is/should be tied to earth ground, and one hot with a

As long as the two power supply conductors that you're hooking the pump up to have a 240V potential between them, the pump should be fine.

Pump won't run, since there's no completed circuit.

Pump won't run, since there's no completed circuit.

Since the pump was designed to be operated at 240V anyway, that shouldn't be a concern.

If the red and black (wires on the pump) are supposed to have 230VAC across them, then my instructions were correct. What makes you think the Philippines is supplying split-phase power? More importantly, why do you think it makes a difference?

Boy, that advice sounds familiar!

Back up and re-read. I was correcting your erroneous and dangerous statement that black is neutral in North American power wiring. It's not. Ever.

I was giving advice to a guy in the Philippines, and I'd qualified my remark about red vs. black. My remark may have been technically wrong, but your advice to the guy I was advising was IDENTICAL.

Thanks for the info about NA power wiring, though. Any idea whether gray, pink, or flourescent orange should be phase A, B, or C?

Not just "technically wrong" but potentially deadly. That's why I said something.

In North America, gray is not permitted to be anything but neutral, ever.

With regard to the others, I have no idea. I've never worked with three-phase power. All I can tell you there is that the Code does not specify color codes for the different phases. I believe the trade has adopted informal conventions, but I do not know what they are. Google is probably your friend.