When working on or near a CRT, follow all safety rules and take every precaution against breaking the tube, especially at the neck where the tube is thinnest. General Setup Rules Electric Outlet - Be sure your outlet is correctly wired and properly grounded. Polarity and ground testers are available from most electronics stores. Test all outlets in your service shop before working on any electrical equipment. If you have any doubts about the wiring in your building, consult a qualified electrician.
Adapters defeat the ground pin, which is a safety feature.
Buddies - Do not work on a CRT alone. If there is an accident, having someone else nearby could save your life. Metal jewelry is an excellent conductor of electricity. Removing jewelry will reduce the possibility of electrical shock. Grounding Devices - Never use a grounding wriststrap or heelstrap or work on a grounded workbench mat when discharging a CRT or when performing live adjustments.