IEEE 1584 · Engineering
Arc Flash Analysis That Goes The Extra Mile
Free ConsultationEstablishing an electrically safe work condition
NFPA 70E is built around a simple hierarchy: establish an electrically safe work condition, and where that is not feasible, justify energized work and control the hazard. Both halves require knowing the energy.
What We Deliver
Incident energy per working position
Energy is calculated in cal/cm² to IEEE 1584-2018 from the electrode configuration, enclosure dimensions, gap and working distance recorded on site, rather than assigned from a task table with conditions your installation may not meet.
THE HIERARCHY
De-energize first, and prove why not
NFPA 70E treats energized work as the exception requiring justification, not the default. Making that judgment honestly requires knowing what the exposure actually is, which is the one input most sites have never established.
- Assessment to IEEE 1584-2018 with the model's validity range stated and any extrapolation beyond it identified rather than absorbed silently.
- Fault current from a short circuit study to IEC 60909, using the available fault current obtained from the serving utility.
- Both maximum and minimum source conditions assessed, since reduced fault current can fall below an instantaneous threshold and extend arcing duration.
- Clearing times read from installed devices as actually set, because settings schedules and protective devices diverge over the life of an installation.
- Installation findings referenced to the NEC, so remediation is expressed in the terms your electrical contractor already works to.
DELIVERABLES
What you receive
A signed engineering report aligned to NFPA 70E and IEEE 1584, issued by the engineer who carried out the field work.
- 1Incident energy and arc flash boundary by equipment and working position, with working distance stated
- 2Labels meeting NFPA 70E content expectations, with a placement schedule and review date
- 3PPE specification per position, referenced to calculated energy rather than a task table
- 4Mitigation options for every position above the practical PPE limit, with the clearing-time change each requires
- 5The calibrated ETAP model, so a utility or equipment change is re-assessed rather than assumed
How the study runs
Identify energized work
We establish which equipment is genuinely worked on energized, since NFPA 70E treats that as the exception and the scope follows from it.
Field data collection
Enclosure dimensions, electrode configuration, gap and working distance are recorded with nameplate data, because the result is sensitive to each.
Available fault current
The figure is obtained from the serving utility for the service point, and a short circuit study establishes bolted fault current at every bus.
Protective device review
Settings are read from the devices and clearing time is taken from the real characteristic at the calculated arcing current.
Calculate, label and specify
Incident energy, boundaries and PPE are determined per position, labels are produced, and permit content is prepared where energized work continues.
Report and train
Findings are ranked and the qualified persons who work on the equipment are briefed, so labels are understood rather than merely applied.
Industries We Empower
Oil & Gas
Upstream, midstream, and downstream facilities
Healthcare
Hospitals, clinics, and medical campuses
Data Centers
Tier I through Tier IV facilities
Manufacturing
Production lines and industrial plants
Utilities
Generation, transmission, and distribution
Commercial Real Estate
Office buildings and retail complexes
Education
Universities, schools, and research labs
Government
Federal, state, and municipal facilities
Frequently asked questions
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