How to make sure 230.72(C) is code compliant for tenant

[electricalintern]

The electrical room houses a main service disconnect serving 10 tenants—5 on the lower level and 5 on the upper floor—along with a separate house panel.

My tenant is taking over two tenant spaces:

• Space A has a 400 AMP, 208V, 3-phase service.
• Space B has a 200 AMP, 208V, 3-phase service.

Both panels in the tenant spaces are MLO (Main Lug Only).

The base building engineer prefers not to combine the services into a single 600 AMP, 208V, 3-phase service.

Is it acceptable for the panels to remain as MLO?

Additionally, the 400 AMP service will supply two subpanels, each rated at 125 AMP.

 

[augie47]

Each panel would need to be protected by an overcurrent device not exceeding the panel rating.
The OCP can be located within the panel or ahead of a MLO panel.
The two individual MLO panels can remain as long as they have proper protection,.
A 600 amp overcurrent device can not be the only protection on the panels you describe.

 

[electricalintern]

Each panel would need to be protected by an overcurrent device not exceeding the panel rating.
The OCP can be located within the panel or ahead of a MLO panel.
The two individual MLO panels can remain as long as they have proper protection,.
A 600 amp overcurrent device can not be the only protection on the panels you describe.

What other protection device would a 600 AMP panel need.

The 400 AMP and 200 AMP is being feed from a meter bank from the electrical room