Free expert advice

CertificationUpdated 18 Sept 2026

What does the IQ symbol on Spelsberg enclosures mean?

Short answer

The IQ symbol on the specification of some of our electrical enclosures stands for 'Industrial Quality'. We apply it to products designed to offer resilience, safety, ruggedness and longevity, which makes them suitable for harsh operating environments. IQ-marked enclosures withstand extremely low and high temperatures, are flame-, impact-, UV- and weather-resistant, can be used where harsh chemicals are present, and offer ingress protection ratings up to IP68.

The IQ symbol you find on the specifications of some of our electrical enclosures means ‘Industrial Quality’. It is a symbol we associate with products that have been designed to offer resilience, safety, ruggedness and longevity. Our IQ-marked enclosures are therefore ideal for use in harsh operating environments, as well as for addressing highly specific or stringent requirements.

For example, they can withstand extremely low and high temperatures, and they are flame-, impact-, UV- and weather-resistant. They can also be used in applications where harsh chemicals are present, and they offer ingress protection (IP) ratings up to IP68, preventing water and dust from damaging the electrical equipment within.

Additional information on the IQ symbol and its meaning is published at https://www.spelsberg.co.uk/service/technical-information/technical-information/industrial-quality/, and the pictograms used in our product descriptions are explained at https://www.spelsberg.co.uk/service/technical-information/technical-information/pictograms/

Typical IQ-rated enclosures from Spelsberg include:

  • the GEOS series of industrial and outdoor solutions

  • the WKE fire protection junction boxes

  • the AK distribution boards with innovative Air-Technology

Does your installation not quite fit this answer?

Ask a follow-up — we’ll reply within one working day.

Ask a follow-up