Which device secures large wire splices?

Which device secures large wire splices?

• A. Wire nuts
• B. Fuses
• C. GFCI/breakers
• D. Splice bolts/compression lugs

Answer: (D)

When joining large conductors, you need a method that both mechanically holds the conductors together and provides a reliable electrical connection under real-world conditions. Splice bolts or compression lugs accomplish this by clamping the conductors with a bolt or compression sleeve, creating a tight, low-resistance joint that stays secure under vibration and thermal cycling. Wire nuts are intended for smaller conductors and can loosen on large wires. Fuses and breakers protect circuits, and GFCI/breakers provide protection, but they do not secure a splice. So the device that securely attaches large wire splices is splice bolts/compression lugs.

When joining large conductors, you need a method that both mechanically holds the conductors together and provides a reliable electrical connection under real-world conditions. Splice bolts or compression lugs accomplish this by clamping the conductors with a bolt or compression sleeve, creating a tight, low-resistance joint that stays secure under vibration and thermal cycling. Wire nuts are intended for smaller conductors and can loosen on large wires. Fuses and breakers protect circuits, and GFCI/breakers provide protection, but they do not secure a splice. So the device that securely attaches large wire splices is splice bolts/compression lugs.