§ 99.760. Rating of circuits.

For the purpose of this article and Article IV of this chapter, all outside circuits shall be rated under four (4) classes:

(a)

Wires used for telephone, telegraph, fire alarms, district signals, electric bells and other signaling purposes which are attached to sources of electrical energy, which sources develop a difference of potential between any two (2) wires of not over one hundred twenty (120) volts. For brevity these will be known as "telephone and telegraph wires."

(b)

Wires used for electric lighting, electric power or electric heating purposes which are connected to sources of electrical energy which develop a difference of potential between any two (2) wires of over one hundred (100) volts and less than seven hundred fifty (750) volts. Such circuits shall be known as "low potential electric light and power wires."

(c)

Wires used for any purpose which are attached to a source of electrical energy which develop a difference of potential between any two (2) wires of over seven hundred fifty (750) volts and less than fifteen thousand (15,000) volts. Such circuits shall be known as "high potential electric and power wires."

(d)

Wires used for any purpose which are attached to a source of electrical energy which develop a difference of potential between any two (2) wires of over fifteen thousand (15,000) volts. Such circuits shall be known as "extra-high-potential circuits." (Code 1960, As Amend., § 145.020)