Electrical · Start here
Get the electrical job done
Voltage drop, PoE, EV feeders, cable pulling, switchgear receiving, grounding, and power QA.
Run the numbers
Electrical field calculators for sizing, quantities, and loads.
Bolt torque calculatorEstimate bolt torque from the target preload: T = K x D x F, where K is the nut factor.Sling load calculatorFind the tension in each sling leg: (load weight / legs) divided by the sine of the sling angle from horizontal.Energy cost calculatorFind what a load costs to run: kWh = kW x hours, times the rate per kWh, per day and per year.Footcandle calculatorEstimate fixtures for a target light level: target lumens = area x footcandles, divided by the lumens each fixture delivers.Generator runtime calculatorFind how long a generator runs: usable fuel in gallons divided by the consumption in gallons per hour.Generator sizing calculatorSize a generator from the running load plus the largest motor's starting surge, with headroom: peak = running + surge.
All Electrical calculators Check you're ready
Readiness checks before you start the work.
Arc flash readinessA 2 minute check on whether your electrical safety program would actually protect a worker from an arc flash, before an incident or an OSHA inspector tests it.Cash flow readinessA 2 minute check on whether you run a WIP, bill early, and collect fast, before a profitable company runs out of cash.Contractor business healthA 2 minute check on whether your trade business is run on numbers and cash discipline, before a profitable-looking year quietly turns into a payroll you cannot make.Conveyor safety readinessA 2 minute check on whether your conveyor is guarded, e-stopped, locked out, and aligned, before a nip point takes a hand or a jam-clear takes a worker.
All Electrical readiness checks Choose between options
Side-by-side decision guides with a decision table.
Cable tray vs conduitCable tray vs Conduit racewayCopper vs AluminumCopper conductors vs Aluminum conductorsDry-type vs liquid-filledDry-type transformer vs Liquid-filled transformerEMT vs RMCEMT vs Rigid metal conduit (RMC)
All Electrical comparisons Learn the work
Start with the electrical pillars, then go deep.
CCTV system design field guideDesign the camera, resolution, and lens to the scene and the goal in pixels per foot, then size the storage, the network, and the PoE to match.PPE hazard assessment and selectionWalk the task, find the hazard to each body part, pick certified PPE that fits, and document the assessment that backs every choice.DC fast charging station designSize the service before the charger: the transformer, switchgear, demand charges, load management, and the utility timeline that actually controls a DCFC site.Intercom and paging design field guideDesign intercom, paging, and mass notification audio for one thing above features: a message people can actually understand.Dry vs liquid transformer guidePick the transformer type from location, kVA, voltage, fire, and efficiency: dry-type or liquid-filled, ventilated or cast resin, mineral oil or less-flammable ester.Receptacle types and NEMA configsRead the device number off the face, match the configuration to the circuit and the load, and stop adapting around the keying that exists to keep the wrong plug out.
All Electrical field guides Prove it and get paid
Capture the electrical job in the field, build the proof, and send a clean record.