Question

There are different requirements for shock boundaries, depending on whether you are a qualified person or unqualified person.

Drag the various categories of qualified and unqualified persons to the minimum distances they're allowed to approach an exposed energized electrical conductor or circuit part.

Options:

1. Qualified person
2. Unqualified person
3. Unqualified person escorted by someone qualified
4. Qualified person who's fully insulated

Targets:

1. Outside the restricted approach boundary
2. Outside the limited approach boundary
3. Inside the limited approach boundary
4. Inside the restricted boundary

Answer

The restricted approach boundary is the closest that a qualified person may come to an exposed energized electrical conductor or circuit part. It marks a 360-degree area in which there's an increased likelihood of electric shock, due to electrical arc-over combined with inadvertent movement.

The limited approach boundary is the closest distance from an exposed energized electrical conductor or circuit part that unqualified workers may safely stand.

An unqualified person who needs to cross the limited approach boundary must be escorted by a qualified person and advised about the possible hazards.

If a qualified person is insulated from the energized parts and conductive objects, the restricted boundary may be crossed.

Correct answer(s):

Option A = Target 1
Option B = Target 2
Option C = Target 3
Option D = Target 4