About Enclosure Answers and Spelsberg UK
Enclosure Answers is the technical FAQ hub run by Spelsberg UK, a manufacturer of electrical enclosures and connection technology.
We publish free, expert answers to real-world enclosure questions — IP ratings, fire resistance, waterproofing, materials and applications — written by our own engineers.
1904
Founded in Germany — family-owned since.
Telford
UK stock, machining and technical team in Shropshire.
VDE
In-house VDE-approved testing facility.
4,000+
Enclosure and connection products, plus bespoke work.
Our story
Spelsberg has manufactured enclosures and connection technology for over 120 years.
Spelsberg UK, based in Telford, holds UK stock and runs a bespoke machining service — cut-outs, drilling and printing to order.
Enclosure Answers exists because our technical team kept getting the same practical questions from engineers, panel builders and contractors — and the answers weren't written down anywhere public.
So we publish them. Free, impartial, and signed by the engineer who wrote them.
What we do
Manufacture
Thermoplastic, GRP and metal enclosures, junction boxes and distribution boards — tested in our own VDE facility.
Customise
Bespoke machining in Telford: cut-outs, cable entries, printing and assembly to your drawing, at low volumes.
Advise
Free technical guidance through Enclosure Answers — product-agnostic where we can, honest when we can't.