Are boxes or conduit bodies necessary for splices and taps in direct-burial conductors if a splicing device is used?

The requirement for boxes or conduit bodies when making splices and taps in direct-burial conductors is indeed true. This stems from safety and accessibility considerations outlined in the National Electrical Code (NEC) and other electrical standards. Splicing devices need to be housed properly to protect the connections from physical damage and moisture, which are significant concerns in direct-burial applications due to the nature of the environment.

When conductors are buried underground, they are susceptible to soil pressure, moisture, and potential contaminants that could compromise electrical connections. By utilizing boxes or conduit bodies, any splices or taps can be adequately protected and made accessible for future inspections, repairs, or modifications. This ensures ongoing compliance with safety regulations and helps to prevent electrical failures that could arise from improper or exposed connections in buried conduits.

In situations where splices are made without the protection of a junction box or conduit body, there is an increased risk of failure due to environmental factors, leading to compromised safety and functionality. Therefore, proper housing of splicing devices through the use of boxes or conduit bodies is a critical practice in maintaining safe and reliable electrical systems in direct-burial applications.