What safety warning signs should electricians and fitters display during equipment maintenance?

Safety warning signs that electricians and fitters should hang during equipment maintenance

1. Electricians: No live work is allowed. The power-off switch must be locked and hung with the words "Someone is working, it is strictly prohibited to send power" Warning signs.

2. Fitter: Before starting work, check whether the electrical, hydraulic and pneumatic power sources are disconnected. Hang a prohibition sign saying "Under inspection, no operation allowed" at the switch, and appoint a dedicated person to monitor it.