IBM 3270 Quick Reference page 13

The following notes apply to the electrical safety notice on the facing
page:
1. In the UK, by law, the telephone line cable must be connected
after the power cable.
2. In the UK, by law, the power cable must be disconnected after the
telephone line cable.
3. See Appendix A for national language safety notices.
CAUTION:
This product is equipped with a 3-wire power cord and plug for the user's
safety. Use this power cord in conjunction with a properly grounded
electrical oudet
to
avoid electrical shock. See Appendix A for national
language safety notices.
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