NEMA EW 4-1993
Graphic Symbols for Arc Welding and Cutting Apparatus

Standard No.

NEMA EW 4-1993

Release Date

1993

Published By

National Electrical Manufacturers Association（NEMA)

Status

Withdraw

Replace By

NEMA EW 4-2009

Latest

NEMA EW 4-2009

NEMA EW 4-1993 history

• 2009 NEMA EW 4-2009 Graphic Symbols for Arc Welding and Cutting Apparatus
• 1993 NEMA EW 4-1993 Graphic Symbols for Arc Welding and Cutting Apparatus
• 1982 NEMA EW 4-1982 GRAPHIC SYMBOLS FOR ARC WELDING APPARATUS (WITHDRAWN)