(6) Use a three wire type soldering iron including a grounding wire.
Fig.4 Grounding a solder iron
Use a high insulation mode (100V
or higher) when ordinary iron is to be used.
(7) In checking circuits for maintenance, inspection, or some others, be careful not to have the test probes
of the measuring instrument shortcircuit a load circuit or the like.
Bare copper wire (for body earth)
Al. stainless steel, etc.)
Fig.3 Grounding of the working table
Screw stop at the screwed