A 45 kVA, 480 to 208Y/120-volt dry-type transformer is located in front of a plywood telephone equipment board attached to the wall. The minimum clearance from the transformer to this combustible wall covering is:

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Multiple Choice

A 45 kVA, 480 to 208Y/120-volt dry-type transformer is located in front of a plywood telephone equipment board attached to the wall. The minimum clearance from the transformer to this combustible wall covering is:

Dry-type transformers must be kept a safe distance from combustible surfaces to prevent heat buildup and reduce fire risk, while still allowing air to circulate for cooling. In this setup, the plywood wall covering is combustible, and for a 45 kVA dry-type transformer, the minimum distance to that surface is 12 inches. This spacing helps prevent heat or any fault energy from reaching the wood, and it also leaves room for ventilation and maintenance. If the wall were noncombustible, the required clearance could be less, but with a combustible wall covering like plywood, 12 inches is the standard minimum for this transformer size.

A 45 kVA, 480 to 208Y/120-volt dry-type transformer is located in front of a plywood telephone equipment board attached to the wall. The minimum clearance from the transformer to this combustible wall covering is:

Prepare for the Independent Electrical Contractors (IEC) Year 4 Exam. Access flashcards, multiple choice questions, and detailed explanations. Enhance your readiness and achieve your certification!

A 45 kVA, 480 to 208Y/120-volt dry-type transformer is located in front of a plywood telephone equipment board attached to the wall. The minimum clearance from the transformer to this combustible wall covering is:

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