G4E04:Why should DC power for a 100-watt HF transceiver not be supplied by a vehicle’s auxiliary power socket?
Direct answer summary (2023-2027 NCVEC pool)
The official correct answer for G4E04 is The socket’s wiring may be inadequate for the current drawn by the transceiver.
The reason is the socket’s wiring may be inadequate for the current drawn by the transceiver. Connect the cause in the question to this direct result instead of memorizing the answer letter.