Disclose Lightning Protection and Grounding for GPU Offtake Pads

Consider an illustrative site-owner handoff: a former industrial parcel has available electrical capacity, an existing grounding drawing, and surge protection at the main switchgear. The owner presents it as ready for dense Supermicro HGX B300-class IT loads. Then the buyer overlays two proposed halls on the drawing. Neither appears within the documented lightning-protection coverage, and nobody can identify the bonding arrangement between the old plant and the new electrical rooms.

The problem is not necessarily an unusable site. It is an unsupported readiness claim. Disclose what exists, what the evidence covers, and what remains proposed before “industrial power” becomes shorthand for protection nobody has verified.

1. Identify the lightning protection system and its coverage

Start with the lightning protection system (LPS) type: conventional air terminals and down conductors, another documented arrangement, or no documented system. If the system type is unknown, say so.

Name the standard and edition referenced in the available design or inspection documents—for example, NFPA 780 or IEC 62305 where applicable. A standard listed in a brochure is not evidence that the installed system conforms to it.

Provide a marked plan showing:

• Existing protected structures and proposed GPU hall footprints.
• Air-terminal locations and documented protection coverage.
• Down-conductor routes and connections to the grounding electrode system.
• Additions, rooftop equipment, or hall locations outside the documented assessment.

Separate installed, designed but unbuilt, and not yet assessed. Do not extend an existing building’s protection claim to a neighboring pad without supporting engineering.

2. Describe grounding, bonding, and surge protection separately

For a dense Supermicro HGX B300 deployment, the architecture establishes the intended IT context—not proof that legacy electrical infrastructure is suitable.

Describe the grounding electrode system using available records: grounding rings or grids, rods, concrete-encased electrodes, structural connections, and documented interconnections. Identify which portions serve the offered parcel and which belong to retained industrial operations.

Then disclose the equipotential bonding arrangement for proposed IT and electrical rooms. Identify documented bonding paths among relevant grounding systems, equipment enclosures, structural metal, and other conductive services. Where rooms remain conceptual, label the bonding plan as pending rather than implying completion.

Provide a surge protection device (SPD) schedule showing documented locations on utility and critical IT feeds: service entrance, distribution equipment, hall-level panels, and downstream equipment where present. Include device identifiers, available ratings, condition indicators, and any documented coordination review.

Main-gear SPDs alone do not establish protection throughout the proposed IT distribution. Ask the electrical PE to assess coverage and coordination; the disclosure should report findings, not prescribe an unreviewed design.

3. Attach an evidence annex with dates and limits

Make every material claim traceable. A compact annex should contain:

• Design drawings: LPS layouts, grounding plans, bonding details, and electrical one-lines, with revision dates.
• Engineering authentication: PE stamps if available, including the jurisdiction and scope covered.
• Inspection reports: inspection dates, inspected areas, findings, corrective actions, and unresolved deficiencies.
• As-built grounding resistance tests: dates, test locations, methods, recorded conditions, results, and the applicable acceptance basis.
• Maintenance records: responsible party, maintenance schedule, last completed work, and known damaged, disconnected, or replaced components.

A resistance measurement is evidence about a particular test—not a standalone guarantee of lightning performance or IT uptime. Do not invent an ohmic threshold or characterize an old test as current verification.

State whether drawings are design documents or verified as-builts. If records are missing, identify the missing evidence, the party responsible for obtaining it, and any proposed verification milestone.

4. Surface the three gaps buyers should not have to discover

“Industrial power” without LPS disclosure. Available megawatts and historical industrial use do not establish lightning protection. Replace the marketing claim with a documented system description or an explicit unknown.

SPDs only at main gear. Show the actual protected locations and disclose the absence of documented protection near proposed IT halls. Do not imply that upstream equipment resolves every downstream exposure.

Grounding shared with unrelated heavy industry. Shared infrastructure is not automatically disqualifying, but unclear bonding, interfaces, maintenance responsibilities, and modification rights create unresolved questions. Provide the available bonding plan and identify the review needed before claiming suitability.

For each gap, distinguish an observed deficiency from missing evidence. They are not interchangeable.

5. Keep the disclosure narrow and actionable

This annex addresses lightning interception, grounding, bonding, and surge-protection evidence. It does not replace separate disclosures about backup duration, hazard envelopes, suppression systems, or infrastructure control.

Carry its findings into your site-owner GPU offtake brief. For broader deployment context, see Pacific’s bridge-capacity pathway and capacity overview, without treating either as certification of your parcel.

Before circulation, ask counsel and an electrical PE to review the proposed disclosure language, evidence boundaries, and unresolved obligations. Applicable requirements remain subject to the relevant authorities; this package is not an AHJ approval.

Ready to organize the site evidence? Schedule a site-owner disclosure discussion with Pacific Intelligent Technologies, Inc..

FAQ

Does this replace backup-power disclosure?

No. UPS and generator disclosure addresses continuity resources; lightning and surge protection address different electrical exposures.

Should flood risk and suppression details go here?

Cross-reference flood and fire risk and fire-suppression agent disclosure. Keep their hazard and system details separate.

What if the substation owner maintains part of the grounding system?

Identify that interface and link the responsibility record to substation ownership and control. Ownership alone does not establish condition, bonding adequacy, or inspection status.