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

SO-RCD

IEC

RCD-protected socket outlet

Some outlets include a residual-current device in the accessory so that protection is provided at the point of use. Plans show this by tagging the outlet with RCD or a small residual-current mark, letting the electrician select a protected accessory instead of relying on the distribution board.

Drawing use: GA
Application: Installation & communications
Reference family: IEC
Form evidence: Socket outlet with residual-current device. 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 outlet on a circuit protected by a residual-current circuit breaker is drawn plainly; this form puts the RCD in the outlet.

Full reference

RCCB

Symbols

Residual-current circuit breaker

An RCCB operates on residual current and has no integral overcurrent protection. The schematic needs both the sensing arrangement and the upstream or associated overcurrent protective device.

Drawing use: SLD / Schematic
Application: Power distribution
Reference family: IEC / Manufacturer

A distinction that matters

An RCBO also includes overcurrent protection; an RCCB does not.

Full reference

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