Meter sockets and meter disconnect switches are required to be connected on which side of a service disconnecting means?

The correct choice is that meter sockets and meter disconnect switches should be connected on the source side of the service disconnecting means. This is in accordance with the National Electrical Code (NEC) and is rooted in safety and operational practicality.

By connecting them on the source side, they are positioned before the service disconnecting means, allowing for the measurement of electrical consumption and providing a means to safely disconnect the electrical supply for maintenance or emergency purposes. This location ensures that the meter is measuring all the current flowing into the service panel, thus giving an accurate reading of energy usage.

In contrast, connecting them on the load side would mean they are positioned after the service disconnect. This arrangement could limit the effectiveness and safety of both the meter and the disconnect switch, potentially exposing technicians to live circuits when they attempt to read the meter or perform maintenance. Additionally, having meter sockets on the load side may not comply with local electrical codes designed to safeguard against such risks.

These design considerations are critical for ensuring the safety of electrical systems and equipment while also allowing for accurate monitoring of energy consumption.