A mechanically formed copper tee is for _____ ground only.

A mechanically formed copper tee is for _____ ground only.

• A. Above
• B. Below
• C. Outside
• D. Inside

Answer: (A)

Mechanically formed copper tees rely on a compression/crimped seal and gaskets that are designed for accessible, above-ground installations. In that environment, joints can be inspected, serviced, and dried out if needed, and the seal materials are suitable for exposure to air and indoor conditions. Underground or below-grade use subjects the joint to soil moisture, backfill pressure, movement, and aggressive ground chemistry, which can degrade the seals and compromise the fit. For buried installations, joints must be rated for underground service and are typically soldered/brazed copper connections or other underground-rated fittings. So, this type of tee is specified for use above ground only.

Mechanically formed copper tees rely on a compression/crimped seal and gaskets that are designed for accessible, above-ground installations. In that environment, joints can be inspected, serviced, and dried out if needed, and the seal materials are suitable for exposure to air and indoor conditions. Underground or below-grade use subjects the joint to soil moisture, backfill pressure, movement, and aggressive ground chemistry, which can degrade the seals and compromise the fit. For buried installations, joints must be rated for underground service and are typically soldered/brazed copper connections or other underground-rated fittings. So, this type of tee is specified for use above ground only.