The Robertson bit, or a Canadian, is square bit screws are generally considered to be faster and more secure to use than Philips screws in circuit breaker wiring applications.
This is because the square bit engages with the screw more deeply and provides a better grip, which reduces the risk of cam-out (when the screwdriver slips out of the screw). And square bit screws also tend to have a higher torque rating, meaning that they can be tightened more securely.
Here are some specific advantages of using Roberts Canadian square bit screws for circuit breaker wiring:
1 Faster installation: Square bit screws can be installed faster than Philips screws because the screwdriver does not need to be re-positioned as often. This is because the square bit engages with the screw more deeply and provides a better grip.
2 More secure connection: Square bit screws can be tightened more securely than Philips screws, which reduces the risk of the screw loosening over time. This is important for circuit breaker wiring, as a loose connection could lead to arcing and other electrical hazards.
3 Reduced risk of cam-out: Cam-out is when the screwdriver slips out of the screw, which can damage the screw head and make it difficult to remove. Square bit screws are less likely to cam-out than Philips screws because the square bit engages with the screw more deeply.
Overall, Roberts Canadian square bit screws are a good choice for circuit breaker wiring applications as they offer faster installation, a more secure connection, and a reduced risk of cam-out.
Do not over-tighten the screw at the head or circuit breaker. Follow the manufacturer’s instructions when wiring circuit breakers.