In what way is a switchboard typically accessed?

A switchboard is designed for accessibility from both the front and rear to facilitate maintenance, operation, and troubleshooting. This configuration allows for easier access to circuit breakers, control devices, and wiring, enabling electricians and maintenance personnel to perform their tasks effectively without compromising safety.

Access from both sides also enhances operational efficiency, especially in larger installations where space is limited or when multiple connections need to be monitored or altered. This design consideration aligns with the National Electrical Code's guidelines, which emphasize safe work environments and accessibility for electrical equipment.

The other choices imply a limitation in access either from one side or none, which does not reflect the purpose and regulation standards that govern how switchboards should be installed and maintained in real-world scenarios.