What Is High-Security Cache Architecture? (Faraday Safes)
High-security cache architecture is a planned, accessible installation of a physical security container and a tested Faraday enclosure, with each providing a different kind of protection. The enclosure limits electromagnetic interference only to the level shown in its test report. It does not, by itself, prevent theft, provide a fire rating, or replace code-compliant placement and installation.
A well-finished installation can sit neatly in a utility room, office, or other suitable space without looking like an afterthought. That clean result depends on the details behind it: the product’s test evidence, sound anchorage, safe access, and room for inspection. A discreet finish may suit a home, but hiding equipment is not a security control and must never block access or required clearances.
Planning the Faraday Enclosure and Verifying Its Test Claims
A Faraday enclosure is a conductive enclosure designed to reduce electromagnetic energy reaching its contents. Its actual performance depends on the tested enclosure and how it is installed. Before buying one, match the product’s documented limits to your needs, then check the site, access route, floor, and local requirements.
The term “high-security cache architecture” is best treated as a design approach, not a product rating. It combines a physical container, a verified electromagnetic shield, and a compliant location. Those functions need separate evidence. A heavy cabinet may resist some physical attacks, but its weight does not prove shielding performance.
IEEE 299 provides methods for measuring the shielding effectiveness of enclosures. It does not set one universal shielding value for all products. Ask for the test report, not just a label or marketing claim. Review:
- The tested frequency range and measured results.
- The test configuration, including doors, seams, and any openings.
- Whether the product and installation you are buying match the tested arrangement.
- The manufacturer’s installation, anchorage, and maintenance instructions.
A decibel (dB) result describes the measured reduction in electromagnetic energy under stated test conditions. It is not a promise of the same performance in every room or setup. Ordinary sheet metal, conductive paint, or a grounding connection alone does not establish a verified shielding level.
There is no universal clearance, ventilation rate, or anchorage load for every Faraday enclosure. Use the selected model’s manual and site-specific requirements. Also separate fire protection from electromagnetic shielding: UL 72 covers fire-resistance tests for record-protection equipment. A Faraday claim does not establish a fire rating. If fire protection matters, verify a separate tested rating and its limits.
| Need | Evidence to request | What it does not prove |
|---|---|---|
| Electromagnetic shielding | IEEE 299 test report with range, results, and configuration | Physical theft resistance or fire protection |
| Fire protection | Applicable fire test and rating for the product | Shielding performance |
| Physical security | Product documentation for the intended threat and installation | That the enclosure resists every attack |
| Safe installation | Model-specific manual and anchorage instructions | Suitability for every floor or wall |
Next step: Write down what you need to protect against, then compare that need with documents for the exact model.
Access, Door Swing, and Applicable Electrical Clearances
Plan access before setting the enclosure in place. The door must open as the manufacturer requires, and people must be able to inspect and service the unit. If it is near electrical equipment, check whether the NEC’s required working space applies. That space is not a general clearance rule for every cabinet.
Start with a site survey. Confirm the local jurisdiction and adopted code edition, the substrate, floor capacity, moisture conditions, delivery route, and final door-swing envelope. Check nearby panels and other electrical equipment before choosing a location. Do not put a cabinet in a required electrical working space.
Where NEC 110.26(A)(1) applies, working-space width is at least 30 inches or the equipment width, whichever is greater. This is a width requirement for the applicable electrical working space, not a universal gap around a Faraday enclosure. Under NEC 110.26(A)(2), working-space depth depends on the voltage and exposure condition in the code table. There is no single depth that fits every installation.
The adopted NEC edition and local amendments control. If the location is unclear, ask the local authority having jurisdiction (AHJ) or a qualified electrician before installation. Preserve access to the electrical equipment, exits, and any area that must remain open for inspection or emergency response.
| Site check | Measure or verify | Why it matters |
|---|---|---|
| Electrical working space | Applicable width and table-based depth | A cabinet must not occupy required workspace |
| Door operation | Full swing and usable approach | A restricted door can prevent inspection or access |
| Floor and substrate | Product weight, filled weight, and anchorage requirements | The structure must support the installed load |
| Delivery path | Turns, openings, and final placement | The unit must reach the site without unsafe handling |
| Moisture | Site conditions and product limits | Water can damage contents or seals |
Next step: Mark the enclosure footprint and door swing on the floor, then compare them with the measured electrical workspace and access path.
Installation, Anchorage, and Finish Without Unapproved Penetrations
Installation must preserve the arrangement covered by the manufacturer’s instructions and test documentation. Anchor only as directed, and do not drill, vent, or route cables through the enclosure unless the manufacturer approves it. A tidy finish is useful, but not if it changes the tested shielding system or blocks inspection.
Before delivery, confirm that the floor or supporting structure can carry the product’s total installed load. Include the enclosure, contents, and any specified base. Have the manufacturer or a qualified structural professional assess uncertain floors or unusual loads. Do not infer capacity from the unit’s footprint alone: loads, framing, supports, and floor condition all matter.
Follow the model’s anchorage instructions for the actual substrate. Do not substitute fasteners or attachment points without approval. If the manual calls for bonding or electrical continuity work, follow its stated method and use a qualified electrician where required. Grounding is not a substitute for shielding tests, and adding a ground connection does not prove the enclosure meets a particular dB value.
Keep the enclosure’s seams, door contacts, and seals as designed. Unapproved holes can create paths for electromagnetic energy and may weaken the product’s tested configuration. Do not add cable openings, vents, or a decorative cover that restricts the door or prevents inspection. Finish around the enclosure, not across its operating parts.
Heat needs special attention. A tightly sealed enclosure can retain heat from powered or heat-generating electronics. Do not store powered equipment inside unless the product explicitly permits it and provides an approved thermal-management design. Adding vents without approval may reduce shielding.
Next step: Photograph the installed anchorage and keep the manual, test report, and any approved installation changes with the home’s records.
Commissioning, Documentation, and Periodic Inspection
Commissioning is the check that the enclosure works as installed and remains accessible. It includes door operation, seals or contacts, anchorage, and any continuity or shielding tests specified by the manufacturer. Record the results and retain the product documents so future inspection does not rely on memory.
Use a simple handover checklist:
- Confirm the model and serial number match the purchase documents.
- Check that the door opens, closes, and latches as instructed.
- Inspect visible seals, seams, and contacts for damage or obstruction.
- Confirm that anchorage matches the manual and substrate.
- Complete any manufacturer-specified continuity or shielding test.
- Record who performed the work, when, and which test method was used.
Do not claim a shielding result from a visual check or an improvised test. If the manufacturer specifies a test, follow its method and retain the report. If shielding performance is critical and the installation has changed, ask the manufacturer or a qualified test provider whether a new measurement is needed.
Set inspection intervals based on the manual, use, and site conditions. Check sooner after moving the unit, changing approved components, or seeing damage to a door, seal, or contact. Keep a clear route to the enclosure and preserve any required electrical working space over time.
Next step: Store the test report and inspection notes where a future owner or service professional can find them.
Real-World Installation Scenarios
These are planning examples, not reports of specific completed jobs. They show how the same product can require different checks depending on its location and use. In each case, the manufacturer’s instructions and local rules take priority over a generic layout.
Home office: A homeowner wants to protect electronic devices from electromagnetic interference. The installer checks the test report’s frequency range and configuration, confirms the enclosure’s door can open fully, and keeps heat-generating equipment out unless the product supports it. The cabinet remains accessible rather than being sealed behind built-in finishes.
Utility room near a panel: A tradesperson considers a spot beside electrical equipment. The site survey identifies the applicable NEC working space before placement. The enclosure is moved to a location that does not obstruct that space, and the adopted code edition and local requirements are confirmed with the AHJ or electrician.
Document storage: A homeowner wants both shielding and fire protection. The product documents are reviewed separately: the shielding report is checked for its test results, while the fire rating is verified through applicable fire-test documentation. Neither claim is assumed from the other.
Key takeaway: The best location is not simply the one with the least visibility. It is the one that meets the product instructions, site conditions, access needs, and applicable code.
Conclusion: Build Around Verified Performance
A dependable Faraday installation begins with evidence, not appearance. Use the IEEE 299 report to understand tested shielding performance, the manual to guide installation, and local code review to confirm placement. Treat physical security, fire protection, and electromagnetic shielding as separate requirements. Keep the enclosure accessible, avoid unapproved changes, and document the final checks.
FAQs
What does a Faraday enclosure protect against?
It is designed to reduce electromagnetic energy reaching its contents. The amount of reduction depends on the product and the tested setup shown in its report.
Does IEEE 299 give every enclosure the same shielding rating?
No. IEEE 299 describes measurement methods. Review the product’s own report for frequency range, measured results, and test configuration.
Does grounding make a cabinet a Faraday safe?
No. A ground connection alone does not prove shielding performance. Follow the manufacturer’s instructions and rely on applicable test evidence.
Can I drill a hole for a cable or vent?
Do not do so unless the manufacturer approves it. An unapproved opening can change the tested configuration and may reduce shielding.
Is a Faraday enclosure fire-rated?
Not by default. A shielding claim does not establish a fire rating. Verify separate fire-test documentation, such as an applicable UL 72 rating, if fire protection is needed.
How much clearance does a Faraday enclosure need?
There is no universal clearance. Follow the product manual, allow for door operation and service access, and meet any applicable code requirements.
Can it sit near an electrical panel?
Only if it does not occupy required electrical working space. Where NEC 110.26 applies, width is at least 30 inches or the equipment width, whichever is greater; depth depends on the code table and conditions.
Can I store powered electronics inside?
Only if the product expressly allows it and provides an approved thermal-management plan. A sealed enclosure can retain heat, and added vents may affect shielding.
Does a Faraday enclosure prevent theft?
Not by itself. Electromagnetic shielding and resistance to physical attack are separate properties. Review the product’s physical-security documentation for your needs.
What should I keep after installation?
Keep the manual, shielding test report, fire-rating documents if applicable, anchorage details, and commissioning or inspection records.
(This article was written by one of our staff writers, Garrett Vance. Visit our Meet the Team page.)
