The Siemens 5UB1475 is the orange variant in the DELTA profil title-block SCHUKO socket family. VDE assigns orange to ZSV circuits — zusätzliche Sicherheitsversorgung, or additional safety power supply. These circuits stay live when the main building disconnect is thrown, feeding equipment that must remain operational during maintenance shutdowns: backup lighting, monitoring systems, BMS controllers, and security infrastructure.

Orange vs green vs red — VDE color coding explained

Three socket colors map to three distinct power domains in German electrical standards. Green (SV, 5UB1474) is the highest tier — safety circuits whose failure creates an immediate hazard: smoke control, fire alarm, gas detection. Orange (ZSV, 5UB1475) is the middle tier — additional safety circuits that must survive a main disconnect but whose momentary loss is not catastrophic: emergency lighting, security cameras, building automation. Red (5UB1476) is for emergency/standby power from generators or UPS. If you are unsure which applies, the building's safety concept (Sicherheitskonzept) document governs the assignment.

Labeling and live-status indication

Like the green 5UB1474, the 5UB1475 includes both a transparent labeling window for circuit-ID insertion and a glow lamp that confirms the socket is energized. On ZSV circuits, the indicator is especially useful — it tells maintenance staff that the additional safety supply is active and the socket is ready for use, without needing a plug-in tester.

Installation

Flush-mount into a 45 mm box. Screwless plug-in terminals, 2.5 mm² max conductor. Fits all DELTA profil 65 × 65 mm frames. IP20 indoor only. The orange housing is integrally molded thermoplastic — permanent color, not a surface coating.

Frequently Asked Questions

Can I use an orange socket on a general-purpose circuit?

Technically yes — the electrical rating is the same 16A/250V — but it violates VDE color-coding convention. An orange socket on a non-ZSV circuit creates a false safety signal that could mislead maintenance personnel or first responders.

Is the labeling field removable?

The transparent window opens for label insertion and replacement without removing the socket from the wall.