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Will be using a voltage converter to step down from 220v to 110v in order to operate a small, hand held, motor driven device. The device is meant to operate with the 110v and 60 hz but any converter will not step up the freq from 50 hz, normally supplied with the 220v. Thus my machine wants 60...

Am here in HK with mains at 220v and 60Hz. I would like to buy a device from USA which is only supplied as 110v and 50Hz. This device, a hand held massager, has an internal motor. The manufacturer advises against using a converter but i do not quite understand the total issue. I gather the...

Have a/c unit rated at 3.5 kw and Hagar MCB rated at 16 amps. Would 20amp MCB be better, or even excessive, or is 16 adequate? Formula indicates 15.9 amps for this kw load.

I have concluded that 'ban all sheds' is either afflicted with the mother of all constipations or he is a paid promoter of the Electrical Workers Union. Of course, both may be operating concurrently.

Thanks for those thoughts but am left unsatisfied. Who, exactly, 'mandates' and why for the high amp items? Really am interested in the why the high amp switch is treated differently than the simple low amp switch. Any news on that Q? Thanks again.

Has seen that my 20, 30 amp hot water switches are 2 pole unlike the lamp switches that are only 1 pole (hot wire). Who can tell me the requirements that require a 2 pole switch? What are the benefits or safety features of the 2 pole switch? thnx. And please don't worry anyone-i would not touch...

Here is some info Hagar Metal Consumer Unit Rated 100A 12 Way HE12SN I can understand a cable equal in size between these 2 connections. I can accept that smaller would possibly be unsafe, therefore not OK. But how would a larger cable be of any merit as it seems to me, a rank...

The installation instructions suggest a size difference but do not tell whether the cable should be larger or smaller between these two connections. Equal in size or even larger makes some sense but how could smaller be any benefit. Any ideas? More info on non-local board which no one has...

Can i, a robust 1.8m tall male, achieve this torque with a hand held 8 inch long straight screwdriver held at chest height ? How about a battery powered drill with phillips head? How to judge, or estimate, this measurement without a torque meter? thanks Will be tightening up the MCB supply...

Poor English in the Hagar Installation Instructions leave me uncertain. To quote; " #7. Connect the neutral cable from the lower left switch disconnector terminal, to the Neutral bar and this cable must be than the incoming cable supply C.S.A." Additionally, as quoted in the...

Thanks for the comments both up/down. I will make some adjustments to the situation.

The water heater now in place is 3000W. Which i estimated to be = 6 amps.

I have 60 amps total coming into my flat. One water heater takes a 20 amp breaker, then a 10 amp on/off switch outside the bathroom. In addition, I want to install a continuous water heater in the garage which is 29 amps. Obviously I cannot operate both simultaneously. So I want to install a...

And how to determine the difference between old emulsion paint and limewash/distemper?? Also, did you forget to include a negative word in your reply. Thanks for the ideas and i will press on, but not too vigorously.

Will be soon prepping and painting an interior wall here in Hong Kong where the walls are brick covered with some kind of plaster then painted. If i now scrub the wall with a rough green scrubby the wall paint and plaster just melt away, as if chalk. Some times the paints here are poor grade...

Have learned that this is what i want: Single Pole Double Throw Switch. See here http://www.1728.org/project2.htm towards the bottom of the page.

I want to install a switch which can feed either of two circuits but always at least one of them, never OFF. Does this kind of switch have a special name, and are they common?

Well, my Q here is why do some 'plastic' switches have an earth connection but some plastic switches do not have an earth connection? Also, in my limited understanding i cannot see what matter the 'size' (10, 20, 30 amp) of the switch makes in regards the earthing as i often see this difference...

Well, i see what u r saying regards the 'switch' vs. the back of the box. Sure if the box were metal then always apply earth connection to the box. Of course, all conducting parts of switches are copper metal, now, usually, enclosed in plastic. What about plastic switch boxes which DO have...

The first Sticky on this forum, Lighting diagrams... shows all switches with Earth wire. Why do some require and some not, if Holmslaw is correct? Obviously since LG did not include an Earth connection in the switch i also assume not needed. What about the Sticky? Is that in error?