NWSA Electrical Safety and Grounding 2

Question 1

What is the maximum acceptable ground resistance for a properly installed communication tower grounding system?

Accepted Answer

10 ohms

Answer

Industry and TIA standards generally require tower grounding resistance to be 10 ohms or less for effective lightning and fault current dissipation.

Question 2

Arc flash rated PPE must be worn when a worker is:

Accepted Answer

Within the arc flash boundary of energized electrical equipment

Answer

Workers must wear arc flash rated PPE whenever they are within the arc flash boundary established by the site's hazard analysis for energized equipment.

Question 3

Temporary protective grounds must be installed on de-energized electrical conductors:

Accepted Answer

Before any work begins to protect against accidental re-energization

Answer

Temporary grounds must be applied before work begins on de-energized conductors to protect against inadvertent re-energization from any source.

Question 4

What is the minimum copper conductor size typically required for a communication tower grounding conductor per industry standards?

Accepted Answer

6 AWG copper

Answer

A minimum of 6 AWG copper is typically specified for tower grounding conductors to handle the high-current demands of lightning events.

Question 5

An assured equipment grounding conductor program (AEGCP) on a construction site is an acceptable alternative to:

Accepted Answer

GFCI protection for cord-connected equipment

Answer

Under OSHA 1926.404(b)(1)(ii), a written and enforced AEGCP is an approved alternative to GFCI protection for cord-connected tools and equipment on construction sites.

NWSA - National Wireless Safety Alliance Practice Test

NWSA - National Wireless Safety Alliance Practice Test

NWSA Electrical Safety and Grounding 2