A tamper-monitored junction box that retrofits directly to the standard conduit boxes already on the wall — independently tested by BRE Global, manufactured in the UK. Fit it, close it, move on.
£38.99 ex VAT (£46.79 inc) · trade & volume pricing on request
Got one of our sample packs? The unit in your hand is exactly what ships — same ASA polymer, same fixed print profile, same batch traceability. Below: the proof, the install method and how to order.
Upgrade existing field joints into tamper-detecting enclosures — with no conduit modification required.
Fits over any standard 20 mm or 25 mm conduit box using just two additional screws — drill guide provided. No rework, no coordination with the containment installer, no time lost on site.
Tamper detection on both opening and removal, 5 joule impact to the IK08 test method and IP40 ingress — every test passed, in writing, in a report you can hand to the system designer.
Ideal for Grade 3 upgrade projects where full re-containment isn’t practical or cost-effective. Removable 12-point terminal block keeps cable termination fast and clean on site.
The HSJB has been independently tested by BRE Global against selected clauses of BS EN 50131-3, commensurate with Grade 3, Type B ancillary equipment — report P130175. The BRE results demonstrate that production-grade additive manufacturing is a legitimate process for security applications.
Independent testing is not certification: overall system conformity remains the responsibility of the system designer or installer. Suitable for use in systems designed to comply with PD 6662:2017.
Download the BRE report (PDF) →Tamper alarm generated before access to internal elements was possible — combined front and rear detection, NC contacts.
Full step-by-step guide, printable drill template and commissioning checks:
Installation guide →
| Model | T8-HSJB-STD · adjustable-fixing variant T8-HSJB-ADJ on request |
| Independent testing | BRE Global, selected clauses of BS EN 50131-3, commensurate with Grade 3, Type B ancillary equipment — report P130175 |
| Tamper detection | Combined front and rear, NC contacts, wired in series |
| Impact / ingress | 5 joules to the IK08 test method (BS EN 62262) · IP40 (BS EN 60529) |
| Terminal block | 12-point removable (4 × 3-way), 12–26 AWG |
| Compatible boxes | Standard 20 mm and 25 mm conduit boxes (leg extensions supplied for 25 mm) |
| Fixings | 2 × wall screws with drill guide · 2 × M4 security screws (supplied) |
| Material | ASA polymer, additively manufactured in the UK to a fixed print profile |
| Colours | Black (standard), grey, green, red |
| Environment | Indoor, dry, controlled environments |
£38.99 ex VAT per unit (£46.79 inc VAT) · black, grey, green or red · drill template free with your first order.
Installer or distributor? Ask for trade and volume pricing.
Next-day delivery available on in-stock quantities — Royal Mail Tracked 24. Larger orders usually dispatch within 2 to 3 working days; we'll confirm when you order.
Quantity, colour and delivery postcode — we come back the same working day with confirmation and payment details.
orders@tier8.co.uk →Talk the job through first — conduit sizes, colours, quantities, lead times and trade pricing.
01706 489765 →Full product listing with photos, documentation and every specification detail in one place.
Product page →Not held one yet? Request a free sample unit →
