Need some input. Today I came across a sub panel that is fed from the main panel. All good so far. However, in the main panel the ungrounded conductors feeding the sub were attached to the buss bars using lugs, no breaker present. These means there is no way to shut off power to the sub if necessary without shutting off power to the home. Also, I don’t really know the size of the service to the sub panel (the sub panel is located in the laundry room of the home).
Should the circuit to the sub panel should be protected by a breaker?