Side-by-side reference

Understand the difference.

Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.

First referenceCompare with

EXIT

IEC

Exit sign luminaire plan mark

Exit signs are drawn as a rectangle or luminaire mark with an arrow or EXIT text and, where relevant, the direction arrow that will appear on the sign face. Their position is set by the escape route design and they are usually maintained emergency luminaires.

Drawing use: GA
Application: Installation & communications
Reference family: IEC
Form evidence: Exit sign luminaire. IEC 60617 installation-plan style (architectural and topographical installation symbols); independently drawn, not certified IEC geometry or a database identifier.

A distinction that matters

An emergency luminaire lights the escape route; an exit sign identifies the route and direction.

Full reference

EM-M

IEC

Maintained emergency luminaire plan mark

A maintained emergency luminaire operates as a normal light and continues on battery when the normal supply fails. Plans usually draw the luminaire mark with an emergency indicator, such as a filled segment or a letter E, plus an M or maintained tag.

Drawing use: GA
Application: Installation & communications
Reference family: IEC
Form evidence: Emergency luminaire, maintained. IEC 60617 installation-plan style (architectural and topographical installation symbols); independently drawn, not certified IEC geometry or a database identifier.

A distinction that matters

A non-maintained emergency luminaire lights only on supply failure; the maintained form is lit continuously.

Full reference

Original educational previews. Follow the source references on each full entry for the appropriate standard or selected product.