Understand the difference.

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

SC

IEC

Underwater cable

The underwater cable form identifies a section laid on or beneath a water bed. It appears on offshore wind export and array diagrams, island interconnectors and river crossings. The mark is a route indicator, so it sits on the cable line rather than replacing it.

Drawing use

SLD / GA

Application

Connections & wiring

Reference family

IEC

Form evidence

Underwater cable route form. Independent IEC-context illustration; not certified IEC geometry.

A distinction that matters

An underwater cable is laid in or under water; an underground cable is buried on land.

Full referenceAdd to legend

UGC

IEC

Underground cable

The underground cable form marks a circuit section that is buried, either directly in soil or in buried ducts. Network diagrams use it to separate cable sections from overhead sections, since cables have higher capacitance, lower reactance and are generally not suited to repeated auto-reclose onto a fault.

Drawing use

SLD / GA

Application

Connections & wiring

Reference family

IEC

Form evidence

Underground cable route form. Independent IEC-context illustration; not certified IEC geometry.

A distinction that matters

An underground cable is buried; a conductor in conduit may be above ground and carries different derating.

Full referenceAdd to legend

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