For electrical consultants

Your signature is on it. Be able to defend it.

When a reviewer or an authority questions a figure, you need the clause it came from, not a cell reference. Lumex™ runs IEC 62305-2:2024, NFPA 780-2026 Annex L and AS 1768:2021, shows the working behind every result, and keeps a record of who changed what.

Electrical consultants using Lumex for a lightning risk assessment
What you get

What you need when the number is questioned

An answer for every figure

Each result opens to the working behind it and the clause, table or equation it came from, in the standard you chose. When a reviewer asks where a value came from, you point at the standard, not at a spreadsheet cell nobody can read.

Checked before you trust it

Sphera, the engine inside Lumex™, is checked against each standard. For IEC 62305-2:2024 it reproduces the three Annex F case studies to the published figures. For AS 1768:2021 it is checked against Appendix C and the Standards Australia tool, and for NFPA 780-2026 against a separate build of Annex L.

A report that carries your attestation

A full PDF and a short version with the structure model, the verdict, the protection recommendation and an engineer sign-off block, with your logo and firm name (full white label on Enterprise). Under IEC the verdict is the combined risk R and, separately, the frequency of damage F. Under NFPA 780 and AS 1768 it is R1 to R4, each judged on its own.

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Three standards

Sign to the standard your project names

Pick the standard when you start the assessment. The inputs, the verdict and the report then follow that standard's own method, and a figure from one is never mixed with another.

IEC 62305-2:2024

One risk, one frequency, national rules applied

Nine risk components roll into the combined risk R. Four partial frequencies of damage add up to the frequency of damage F. Each is judged against its tolerable value. Where your country departs from the standard, a jurisdiction profile applies the departure and the report prints it. The Annex F check is an IEC feature. How Lumex™ runs IEC 62305-2:2024.

NFPA 780-2026 Annex L

A simplified risk assessment, then four risks

The simplified risk assessment (L.5) settles the clear cases, and the detailed assessment (L.6) judges R1 to R4 apart. Annex L is informative, but owners, insurers and the authority having jurisdiction ask for it, and any tolerable value they set goes in as data. For a critical facility, L.5.3 looks past the simplified risk assessment. How Lumex™ runs NFPA 780-2026.

AS 1768:2021

Four losses, judged apart, matched to the tool

R1 to R4 are each held to their own tolerable value (Table 2.1) and never added together. The least protection that clears all four follows C.3.4.2. Where the tool and Table 2.1 differ on cultural heritage, the report states both values. Australia only. How Lumex™ runs AS 1768:2021.

A typical job

From appointment to a signed report

Take a common brief. A client appoints you on an office building with a rooftop plant room and incoming power and telecom lines, and the specification names IEC 62305-2:2024. Here is how the job runs in Lumex™. The building is an illustration, not a customer.

  1. Set up the record. Add the client, create a project for the site, and start an assessment under IEC 62305-2:2024 with the site's jurisdiction, so any national departure is applied and printed.
  2. Describe the building. Enter the dimensions, the surroundings, the zones and the connected lines. The risk R and the frequency of damage F update as you type, and each opens to its working.
  3. Find what drives the result. If R sits above the tolerable risk, the trace shows which components carry it, so you know whether the answer is an LPS class, coordinated SPDs, or both.
  4. Compare the protection. Propose the measures and see the risks with them beside the risks as they stand, before you commit to a recommendation.
  5. Review and sign. Submit the assessment for review. Once a colleague approves it, issue the signed full and short reports.
  6. Answer the query. When the authority's reviewer asks where a loss factor came from weeks later, open the figure to its table and clause. If something must change, reissue as a new revision.
Typical deliverables

What you hand over at the end

Full and short reports

The full PDF for the file and a short version for the client, each with the structure model, the verdict, the recommended protection and your sign-off block. See a sample IEC 62305-2 report.

The calculation trace

Every figure with the coefficient, table or tool cell behind it, ready for a design review or an authority's query.

A record that holds up

The approval, the activity log of who changed what, and each earlier report revision kept as issued, so the history of the decision survives the project.

Working to another standard? See the NFPA 780 sample report or the AS 1768 sample report.

When the result is challenged

Answer in minutes, not by rebuilding the file

A challenge usually arrives weeks after you signed. The model, the inputs you used, the values the engine applied and the revision history are all still there, so you can reconstruct your reasoning rather than defend a spreadsheet you no longer remember.

  • Show the reviewer which tolerable values applied. Under IEC 62305-2:2024, clause 7.3 NOTE 1 gives a representative value and national rules may set their own, so the engine resolves it per jurisdiction. Under NFPA 780-2026 the owner or the authority may replace the Annex L defaults. Under AS 1768:2021 the owner picks the one for economic loss.
  • Open any figure to the coefficient, table or tool cell it came from, down to a single loss factor.
  • Read an append-only log of who changed which input and when, so a late edit is never silent.
  • Propose the protection the reviewer suggests and show the risks with it beside the risks as they stand. Under IEC this covers the LPS class and SPD coordination.
  • Reissue a corrected report as a new revision, with the earlier one kept intact.

See what makes an assessment traceable and a report audit ready, or compare the methods in NFPA 780 vs IEC 62305.

A rooftop solar array inspected by an electrical consultant
FAQs

Questions consultants ask

Which standards can an electrical consultant run in Lumex™?

Three: IEC 62305-2:2024, NFPA 780-2026 Annex L and AS 1768:2021. You pick one when you start each assessment, and the inputs, the verdict and the report then follow that standard's own method. A figure from one standard is never mixed into another.

What happens when a reviewer questions a figure after I have signed?

You open the assessment and the figure. Each result shows the working behind it and the clause, table or equation it came from, the activity log shows who changed which input and when, and the earlier report revisions stay intact. If a correction is needed, you reissue the report as a new revision rather than overwriting the one already filed.

What does the report contain?

A full PDF and a short version. Both carry the structure model, the verdict, the recommended protection and a sign-off block for the engineer. Under IEC 62305-2:2024 the verdict is the risk R and, separately, the frequency of damage F; under NFPA 780 and AS 1768 it is R1 to R4, each judged on its own. The report carries your logo and firm name, with full white label on Enterprise.

Does Lumex™ replace my engineering judgement?

No. Lumex™ runs the standard's risk method and shows every step, but you choose the inputs, review the result and sign it. Responsibility for the result stays with the signing engineer, and Lumex™ does not replace the published standard or design the protection system.

Can a colleague review an assessment before it is issued?

Yes. An assessment can be submitted for review, and the reviewer approves it, asks for changes or rejects it. Signed reports are issued for approved assessments, and the report list shows who approved each one.

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Sign the number the standard gives, not the one a stray formula gives

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