The fuse block was installed by my company. But I agree with your comment.
What's the purpose of the fuses? Are they on the line side or load side of the integral disconnect?
They are feeding into the line side of the built in disconnect. The breaker was oversized so it needed to be fused down before the equipment.
The CB is factory installed? It's strange that the factory breaker wouldn't be the correct size. Also I would consider it dangerous to have those fuses energized when the integral breaker is opened. It's not a stretch to think that someone coming along to work on the unit would assume that everything is de-energized once the integral disconnect is opened.
The CB is factory installed but does not do over current protection. The power needed to be fused down before the RTU.
Okay so it's a molded case switch without OCP not a circuit breaker.
Yes, correct
In a proper design the fuses should have been put on the load side of the breaker/switch. At the least there should be a warning label that the 'through the door' disconnect mechanism does not deenergize the fuses.
Is everything code compliant?
The NEC only requires that the fuses have a disconnect someplace on their line side.
