Branch circuits may be overhead or underground. They are often referred to as __________.

• A. Primaries
• B. Feeders
• C. Breaks
• D. Runs

Answer: (A)

Primaries are the high‑voltage distribution lines that run overhead or underground from a substation to the distribution transformers. These lines branch out to feed sections of the network, so in many practice contexts branch circuits are described as primaries. The important idea is that primaries carry the higher voltage down the distribution path and are the stage before the transformer steps voltage down to the lower levels used by customers (secondaries).

Other terms like feeders can refer to similar parts of the system, but the wording here points to primaries as the standard label for these branch lines on the high‑voltage side. Breaks and runs aren’t used to describe this electrical role.