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The Ultimate Guide to Wiska Combi Boxes

Electrical4less
Electrical4less

December 5, 2024

4 min

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Categories: Cable & Accessories Advice
Tags: Outdoor Wiring Guides
Wiska COMBI outdoor installation guide

Wiska COMBI Boxes – Outdoor Installation Guide

Wiska COMBI junction boxes are widely used for protecting electrical connections in outdoor and demanding indoor environments. This Wiska COMBI outdoor installation guide explains how to choose suitable cable entries, glands and connectors, understand IP protection ratings and avoid common installation mistakes.

View Wiska COMBI Range

Wiska COMBI enclosures combine weather-resistant construction with convenient installation features, including cable-entry membranes and captive lid screws on selected models. Choosing the correct accessories is just as important as selecting the junction box itself.

Wiska COMBI junction boxes and outdoor wiring accessories
Wiska COMBI junction boxes for electrical installations

Why Are Wiska COMBI Boxes Suitable for Outdoor Use?

Wiska COMBI boxes are manufactured using materials designed to withstand demanding environments. The range includes UV- and ozone-resistant enclosures, weather-resistant construction and convenient cable-entry arrangements.

  • IP66 protection using the specified membrane entries on applicable models.
  • IP67 protection achievable with suitable cable glands on compatible models.
  • Captive lid screws to simplify opening and closing on selected models.
  • Different enclosure sizes for various cable and connector arrangements.
  • Compatible glands, mounting accessories and connector-equipped versions.

Always position and install the enclosure to suit its environmental rating, the cable-entry arrangement and the manufacturer’s instructions.

Understanding IP66, IP67 and IP68 Protection

IP66 indicates a dust-tight enclosure protected against powerful water jets. IP67 provides protection against temporary immersion under specified test conditions.

Wiska’s COMBI range can achieve IP66 using the specified membrane entries. Compatible models can achieve IP67 when suitable cable glands are installed correctly. The protection rating depends on the complete enclosure and cable-entry arrangement.

Standard COMBI boxes should not automatically be considered IP68 rated. Wiska offers separate specialist IP68 sealing solutions for suitable applications.

For further technical details, refer to the official Wiska UK COMBI Series information.

Choosing the Correct Wiska COMBI Box

Different COMBI sizes suit different wiring arrangements. Smaller models such as the 206 and 308 are useful where space is limited, while larger options such as the 407, 607 and 1010 provide additional room for cables and connectors.

For a detailed comparison of all nine main models, including external dimensions, cable-entry positions and colour options, read our guide to choosing the right Wiska COMBI junction box.

Essential Accessories for Outdoor Wiring

Wiska ShieldGlands

Wiska ShieldGlands are designed for suitable screened and armoured cable termination applications. They should be selected according to the cable construction, enclosure entry and any earthing or screening requirements.

Browse our Wiska ShieldGlands. For standard unscreened cable entry into COMBI boxes, check the appropriate Wiska cable gland recommended for the enclosure instead.

WAGO 221 Series Lever Connectors

WAGO 221 lever connectors offer a convenient way to connect suitable conductors without screw terminals. Their compact design can be useful inside an appropriately sized Wiska COMBI enclosure.

Always check conductor compatibility, connector ratings and enclosure space. WAGO 221 connectors are not themselves waterproof and must be protected by a suitable enclosure or approved sealing arrangement.

Explore our WAGO 221 Series connectors and accessories.

WAGO 207 Series Gel Boxes

WAGO Gelboxes provide an additional moisture-protection solution for compatible connectors in applications where the specified sealing arrangement is required. Correct connector selection, cable entry and installation are essential.

See our WAGO 207 Series Gel Boxes and follow WAGO’s compatibility and installation instructions.

Electrical junction box installation accessories
The Ultimate Guide to Wiska Combi Boxes 5
Wiska COMBI wiring accessory example
The Ultimate Guide to Wiska Combi Boxes 6
Wiska COMBI outdoor electrical accessories
The Ultimate Guide to Wiska Combi Boxes 7

Common Mistakes to Avoid When Installing Outdoor Junction Boxes

  • Choosing a box without enough internal space for cables, connectors and safe terminations.
  • Assuming an IP66 enclosure is suitable for permanent immersion.
  • Using an unsuitable cable gland or exceeding the permitted cable diameter.
  • Leaving unused entry openings incorrectly sealed.
  • Failing to check connector ratings and manufacturer compatibility.

Frequently Asked Questions

Are Wiska COMBI boxes suitable for outdoor installation?
Yes. Suitable COMBI models are designed for outdoor installations when their environmental rating, cable entries and manufacturer’s instructions are followed.
Do I need cable glands with Wiska COMBI boxes?
Not always. Compatible membrane entries can provide IP66 protection. Suitable glands may be required for IP67 protection or particular cable arrangements, depending on the model.
Can WAGO 221 connectors be used in outdoor junction boxes?
Yes, when installed within a suitable enclosure or approved sealing arrangement and used according to WAGO’s ratings and instructions.
Are standard Wiska COMBI boxes IP68 rated?
No. Standard COMBI boxes must not automatically be treated as IP68 rated. Wiska offers separate specialist sealing solutions for appropriate applications.

For compatible enclosures and accessories, explore our Wiska COMBI boxes, Wiska Shop and WAGO Shop.

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