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You're Using the Wrong Screwdriver For Electrical
January 7, 2023 · 15 min · 1.3M views
Nils tightens screw on boat's electrical component with Robertson driver
What this video covers
Electrical work requires specific screwdriver profiles to ensure proper torque and prevent cam-out on modern combination-head screws. While Phillips drivers are common, their tendency to slip and wear down makes them less effective than square-drive alternatives. Testing reveals that Robertson (square) drive bits provide the most secure fit and highest torque for both #1 size screws used in outlets and light switches and #2 size screws found in electrical panels.12:00 Combination drivers, such as the Milwaukee ECX, often fail to seat fully because their geometry bottoms out against the slotted portion of the screw head before engaging the square drive pocket.7:44 For optimal performance, use a dedicated insulated Robertson driver with a slim shaft to access tight terminal blocks.13:06 A kit containing a #1 and #2 Robertson driver, supplemented by standard slotted and Phillips tools, covers the vast majority of residential electrical applications.13:35 Using the correct driver size for the specific screw head prevents damage to the fastener and improves safety.
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