During electrical panel installation, an electrician must work on energized circuits. What is the minimum approach distance for qualified persons working on 480-volt equipment?
Correct Answer
C) Avoid contact
For voltages under 1000V, OSHA requires qualified persons to avoid contact with energized parts. Specific distances apply to higher voltages, but contact avoidance is the standard for 480V.
Why This Is the Correct Answer
OSHA 29 CFR 1926.95(c)(1) specifically states that qualified persons working on energized circuits under 1000 volts must avoid contact with energized parts. For 480-volt equipment, there is no specific minimum distance requirement - the standard is simply to avoid any contact. This is different from higher voltage systems where specific approach distances are mandated. The 'avoid contact' rule provides maximum safety flexibility for qualified electricians working on lower voltage systems.
Why the Other Options Are Wrong
Option A: 1 foot
1 foot is insufficient and not the OSHA standard for 480V systems. This distance would still allow for potential accidental contact. The actual requirement is complete contact avoidance, not maintaining a specific minimum distance.
Option D: 3 feet
3 feet is not the correct approach distance for 480V equipment. This distance requirement applies to higher voltage systems. For voltages under 1000V like 480V, OSHA requires contact avoidance rather than a specific measured distance.
Memory Technique
Think '480 under 1000 = NO TOUCH' - when voltage is under 1000V, the rule is simple contact avoidance, not distance measurements.
Reference Hint
OSHA 29 CFR 1926.95 - Personal Protective Equipment, subsection (c) Electrical protective equipment
More Project Mgmt Questions
What is the minimum R-value required for wall insulation in Florida Climate Zone 2?
A subcontractor brings a new chemical product to your jobsite. Under the Globally Harmonized System (GHS), what information must be immediately available to workers?
A construction site has a trench that is 8 feet deep in Type B soil. What is the maximum allowable slope ratio for the trench walls without protective systems?
What is the maximum recommended spacing between drywall screws when attaching to wood studs?
Your crew discovers suspected asbestos-containing materials during a renovation project. What is the first action you should take?
A scaffold platform is 12 feet long and 5 feet wide. If the maximum load capacity is 25 pounds per square foot, what is the total weight capacity of this platform?
Which CSI MasterFormat Division would contain specifications for fire-stopping and firesafing materials?
In tilt-up concrete construction, what is the primary advantage of this method over conventional cast-in-place construction?
Which OSHA standard specifically addresses construction industry safety and health regulations?
A structural drawing shows a beam labeled 'W12x26'. What does the '26' represent?
People Also Study
Business & Financial Management
120 questions · 70% to pass
Contract Administration
60 questions · 70% to pass