Gewiss GW66420 COMBIBLOC Interlocked Socket 32A 3P+N+E IP44

GW66420 is a COMBIBLOC interlocked socket-outlet with back-mounting box from the Gewiss IB range: 32 A, 3P+N+E, 400 V, red, 6 h, IP44. A mechanical interlock links the switch and the socket so that the plug can only be inserted or withdrawn with the switch open, and the switch can only be closed with a plug fitted.

Interlocked socket-outlet for safer plug-in connections

Gewiss describes the IB range as compact industrial socket-outlets complying with IEC 60309 (EN 60309-1 and EN 60309-4), with a simple, intuitive longitudinal operation of the mechanical interlock. The control switch allows the plug to be connected and disconnected only in the open position, and the switch to close only with the plug inserted. That removes live plugging and unplugging, which is the main reason interlocked sockets are specified for workshops and plant floors.

The datasheet lists a compact version with a back-mounting box, protection IP44, mechanical resistance IK08, and an operating temperature of -25 to +40 C. The datasheet protection field reads NO (SBF); the abbreviation is not explained there, so confirm with us if you need a fuse-protected version.

Key features as printed in the datasheet

• Mechanical interlock between switch and socket (open to insert or withdraw, plug in to close).
• 32 A, 3P+N+E, 400 V, 50/60 Hz; reference position 6 h.
• IP44 with IK08; red.
• Compact type with back-mounting box.
• Glow wire 850 C active parts and 650 C passive parts; thermo-pressure ball 125 C / 80 C.
• Operating temperature -25 to +40 C.
• Combined with accessories for individual or group surface mounting and for flush mounting, including 3-gang rectangular boxes (datasheet).

Technical specification

Electrical

Mechanical and environmental

Selection and ordering guide

Use GW66420 for a 32 A, five-pole, 400 V outlet with bottom (back-mounting box). The Gewiss list shows other IB-range codes with different current, IP degree or with no bottom (for example GW66431 and GW66452); confirm which you need before ordering.

Derived value: at 400 V three-phase, 32 A is about 22 kVA of apparent power (square root of 3 x 400 V x 32 A).

Installation and operation notes

Wire the outlet with the supply isolated and fit the mating plug only after the switch is open; the interlock is designed so the switch cannot close on an empty socket.

The operating range stops at +40 C, lower than the +55 C of the Gewiss HP sockets, so consider shading and ventilation where the box sits in direct sun or near hot process equipment.

Reading the specification line: the “H” family codes in this range (such as GW62220H) are HP-series items, while GW66420 belongs to the IB series, so the two should not be mixed up when you need a matching plug. The IB socket takes a standard IEC 60309 plug of the same current, voltage and 6 h position; the datasheet does not list a plug code, so check the plug datasheet for the pole count and IP rating you need on the cable side.

Applications in Oman and the GCC

Interlocked 32 A outlets are typical in workshops, fabrication halls, plant maintenance bays, generator rooms and temporary construction distribution, where portable tools and equipment are plugged in several times a day.

IP44 is a general-purpose splash-water rating (IEC 60529 coding); for open-air, wash-down or very dusty locations, specify a higher-IP version from the range.

Installation and selection notes

The COMBIBLOC combines a switch and a socket in one housing, so it needs a supply cable sized for 32 A and a protective device upstream. The back-mounting box allows surface installation, and the IP44 rating suits indoor workshops and covered areas rather than direct wash-down. Test the interlock at commissioning: the plug should only enter and leave with the switch open, and the switch should only close with a plug fitted.

Information needed for a quotation

Send the code GW66420, the quantity and the delivery location in Oman or the GCC, and add matching plugs or cable sets if they are needed.

Documents and supply information

The manufacturer data sheet is attached to this page and should be read together with the project specification before a purchase is confirmed. Ratings, dimensions and protection classes are quoted as printed on that sheet. Lead time, stock position and certificates available with the shipment are confirmed in the quotation, and we supply to Oman and the wider GCC region for industrial, utility and building services projects.

Compatible accessories and related items

Accessories for group surface mounting and flush mounting are listed in the IB range section of the Gewiss catalogue. Matching red IEC 60309 plugs include the HP plug GW60042H on this site; check the connection compatibility of your plug family before ordering.

Frequently asked questions

What does the interlock do?

It lets the plug be inserted or withdrawn only with the switch open, and the switch be closed only with the plug inserted.

What are the ratings of GW66420?

32 A, 3P+N+E, 400 V, 50/60 Hz, IP44, IK08.

What is the operating temperature range?

-25 to +40 C according to the datasheet.

Is a back-mounting box included?

The datasheet states with back-mounting box: yes.

Does Seven Star LLC act as a Gewiss distributor?

No. Seven Star LLC is an independent supplier in Muscat that sources Gewiss products on request.

Documents and quotation

This page carries the official Gewiss product data sheet for GW66420. Seven Star LLC is an independent supplier in Muscat and sources Gewiss products on request; tell us the quantity and delivery point to receive a quotation. Always confirm the order code and technical values in the document first. See more in the product category.