various numerical values

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resistivity of the main conducting metals and alloys

Resistivity at °C

rt = r°(1 + at),

ro = resistivity at 0 °C,

a = temperature coefficient.

t = temperature in degrees Celsius.

lead battery voltage

2 volts per element.

minimum isolation for a low voltage motor per service volt

1 000 Ω.

isolation voltage motor Secured image
Table 82. Minimum isolation for a low voltage motor per service volt