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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.

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...

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...

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...

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...

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?

I have a LG rocker with 3 switches, item #2810 04 (like to 2810 05). Each interior switch connection has room for 2 wires, there is no Earth connection to be seen. The 2 holes are labeled, above, 1 or L; below each hole 1 i find a small L letter. Below the L hole a curious angled design. What...

My total incoming max is 60A. Incoming main wires will not change to CU, but inside the flat i am installing new wires. What minimum size, in mm, do i need from CU to water pipe and can i connect off this wire for supplementary use? Tnx. In regards this Q and the previous i posted, the 30A...

here i have a new 30 amp toggle switch with a neon glow lamp indicating ON, when lit (this for my shower heater). Inside i find ( beside earthing connection) four connectors labeled P1, P1, P3,P3 (P2 also found but no connection possible). The tiny neon wires run from P1 and P2 on the ON side...

Will be using PVC conduit to house the single cables. Depending on diameter of conduit and cables am permitted just so many cables. Also involved is the number of 'bends' per length of run. More bends = fewer cables. The question in my mind is why the bends (assume 90*) permit fewer cables? One...

Will be fitting the cables into the PVC with many bends, some 'runs' only 3 inches due to cement pillars and lintels. The local codes, probably very similar to UK, specify number and size of permitted cables in conduit of certain size given the length of run and number of bends (90*). Thus for a...

Will be installing RCD, maybe more than one, close to the wall mounted switches for the kitchen, bath and hot water unit. Present CU has no room for RCD so i will put the RCD in a 'box' between the switches and the CU. Does this plan make sense and, besides buying a new CU, how else to do it?

Am new here (DIYnot and HK) and am rewiring my flat. Lots of ignorance but am progressing. My former experience only in USA, where 110v rules and i can speak the language. Here 220v, poor language communications and mostly UK codes. In house i have only brick walls thus all cables housed in PVC...