Susan Brown
Hi Larry,
The voltage supply is determined by how the circuit is labelled. L-N (120) or L1-L2 (240).
It might be a good idea to rewatch the second video in unit 5 to think a little more about parallel circuits and voltage.
Another hint: sometimes we give you information in a question that may not be needed to answer the question. We’re trying to challenge your understanding in order to improve it!