Fred B
Senior Member
- Location
- Upstate, NY
- Occupation
- Electrician
Slotted screws was the worst. For a while was getting breakers and panels with what was called ECX screws, these were by far the best in my opinion as they gave the best of all three, a phillips, slotted and robertson bits, especially when torquing. Definitely hex for the larger set screws. Not sure why they seem to suddenly stopped using ECX in panels and breakers.
Robertson square when they also have the slotted across like the old panels will stretch and slip before the min torque suggested by the mfg. Plain slotted will spin out and then not turn able let alone able to be torqued.
ECX bit
Robertson square when they also have the slotted across like the old panels will stretch and slip before the min torque suggested by the mfg. Plain slotted will spin out and then not turn able let alone able to be torqued.
ECX bit