Reduced low voltage?

[rich3009]

3. An a.c. voltage of 90V between conductors is classified as

a. extra-low voltage
b. low voltage
c. safety extra-low voltage
d. reduced low voltage

Why cant this voltage fall into the category reduced low voltage, defined as a voltage the doesn't exceed 110v (the answer however is low.)

 

[rich3009]

is it because you would get 110 to earth

 

[westward10]

The question only states the voltage between conductors with no reference of the potential to earth thus you can only point toward low voltage.

 

[Risteard]

Reduced Low Voltage is 55V to Earth for single phase systems or 63.5V to Earth for three-phase systems, with 110V between phases. (There is no neutral on the secondary side in an RLV system.)

 

[Deleted member 26818]

It could be Reduced Low Voltage, but only if the Line to Earth voltage is no greater than 63.5V.