G.S. 84
RESTRICTED
(a)
(b)
(c)
(d)
- 3.
XCR(78)129
or to limit their source of supply to companies prepared to manufacture equipment designed specifically for 200 volts (notably Japanese companies, Tokyo being on 200 volts; and one or two manufacturers of light bulbs). In most parts of the world, domestic equip- ment is manufactured to operate in a voltage range of 220 to 240 volts. And as the Japanese also make to 220 volts, to change would not reduce Hong Kong consumers' choice as far as this source is concerned. On the other hand, it would mean that, for example, equipment manufactured in Hong Kong (basically for export) and in China which could become a useful source for domestic electrical equipment, would operate more efficiently.
The disadvantages are:
power companies would have to recalibrate all meters (twice if the change of voltage is in two stages);
consumers generally may have to pay very slightly more for the improved efficiency - but only in respect of equipment that is not switched off, either automatically or by the operator, when its task is completed. In practical terms for domestic consumers, this means little more than small increases in the cost of electricity consumed by light bulbs which, in any case, are responsible for only a small proportion of most consumers' bills;
consumers generally will find equipment rated at 200 volts will have a slightly reduced service life when operated at a higher voltage;
virtually all the wiring used in Hong Kong is designed to withstand at least 500 volts. In the odd case where the insulation has deteriorated badly, the increase in voltage from 200 volts to 210 volts and then 220 volts could increase the possibility of a fault occuring marginally earlier than it otherwise would. But the intention is to
RESTRICTED