Lineman Technical Standards and Specifications 3

Question 1

What is the standard frequency of the US electrical grid as specified by ANSI C84.1?

Accepted Answer

60 Hz

Answer

ANSI C84.1 specifies that the nominal frequency of the US electrical supply system is 60 Hz.

Question 2

Under NESC Section 23, what is the required burial depth for a 15 kV underground cable in a non-traffic area?

Accepted Answer

24 inches

Answer

NESC requires a minimum burial depth of 24 inches for cables rated 0–22 kV in non-traffic areas.

Question 3

Which specification standard defines the requirements for porcelain and glass insulators used on distribution lines?

Accepted Answer

ANSI C29.2

Answer

ANSI C29.2 defines the dimensional and electrical requirements for wet-process porcelain and toughened glass suspension insulators.

Question 4

What is the maximum allowable voltage deviation from nominal per ANSI C84.1 Range A at the point of delivery to a customer?

Accepted Answer

±5%

Answer

ANSI C84.1 Range A specifies that steady-state voltage at the customer delivery point should remain within ±5% of nominal.

Question 5

When a lineman uses a hot stick (live-line tool), what ASTM standard governs its dielectric testing?

Accepted Answer

ASTM F711

Answer

ASTM F711 covers the standard specification for fiberglass-reinforced plastic (FRP) rod and tube used in live-line tools.

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