NABCEP Safety Practices 5

Question 1

An installer is stringing wire through conduit on a rooftop and feels resistance. A co-worker suggests using a lubricant. Which lubricant is safe to use with PV wiring in conduit?

Accepted Answer

UL-listed wire-pulling lubricant compatible with conductor insulation

Answer

Only UL-listed wire-pulling lubricants compatible with the conductor insulation type should be used; petroleum-based products can degrade certain insulation materials.

Question 2

Which condition requires a solar installer to immediately stop work and evacuate the roof?

Accepted Answer

Lightning is visible or thunder is heard within 30 miles

Answer

The 30-30 rule dictates that if thunder is heard or lightning is seen within 30 miles, work should stop and workers should seek shelter for at least 30 minutes after the last strike.

Question 3

A PV installer is asked to use a scissor lift to install racking on a carport structure. At what wind speed should work from the elevated platform cease?

Accepted Answer

The manufacturer's rated maximum, typically 28–35 mph

Answer

Aerial work platforms must be operated within manufacturer-specified wind speed limits, which are typically listed in the operator's manual and commonly range from 28–35 mph.

Question 4

What information must appear on a lockout/tagout tag to meet OSHA 29 CFR 1910.147 requirements?

Accepted Answer

The authorized employee's name, reason for lockout, and date

Answer

OSHA LOTO tags must identify the authorized employee who applied them, the reason for the lockout, and the date to ensure accountability and safe removal.

Question 5

During a site safety audit, an inspector finds workers not wearing hard hats while working below other crew members on a two-story commercial installation. Which OSHA standard is being violated?

Accepted Answer

29 CFR 1926.100 — Head Protection

Answer

OSHA 29 CFR 1926.100 requires hard hats in construction areas where there is a risk of head injury from falling objects.

(NABCEP) North American Board of Certified Energy Practitioners Solar Practice Test

(NABCEP) North American Board of Certified Energy Practitioners Solar Practice Test

NABCEP Safety Practices 5