It will not generate 'mains voltage' or 'utility power' AC.

它不会产生'电源电压'。

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Mains voltage heating cables shall be adequately insulated and installed in complinance with the relevant Regulations.

供电电压的电热线应依照有关条例恰当地绝缘和装设。

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The operating value of earth leakage protection can be changed with the mains voltage, but the operating value of cables insulation resistance is held the line.

该设计可以根据电网电压的波动调整动作值，从而保证电缆绝缘电阻的动作值不变；

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Now the first mains-voltage LEDs designed as direct replacements for incandescent bulbs are arriving on the market.

ECONOMIST: Lighting: A brilliant new approach | The

Their job is to convert high-voltage alternating current from the mains into low-voltage direct current for mobile phones, laptops, iPods and other electronic gadgets.

ECONOMIST: How a boring gadget saved $2 billion-worth of electricity