A side-by-side dictionary of IEC and NEC earthing, grounding and bonding terms, a labelled service-entrance diagram and what the differences mean on a project.
IEC vs NEC: Earthing, Grounding and Bonding Terms Compared Read More »
The temperatures that keep legionella out of hot water systems, when a recirculation loop is needed, and how to size its flow from the pipe heat loss.
Hot Water Recirculation and Legionella Temperatures Read More »
Size a commercial kitchen grease separator with EN 1825-2 (NS = Qs × ft × fd × fr) or the US sink drain-down method, with worked examples and layout rules.
Grease Interceptor (Grease Trap) Sizing Read More »
Size a standby generator from the running load, then check the largest motor start; a worked example shows how a soft starter saves about 300 kVA of generator.
Standby Generator Sizing: A Quick Method That Works Read More »
A step-by-step checklist for laying out a fire pump room: enclosure, access, heating, suction rules, discharge train, test header, controllers, diesel fuel and jockey pump.
Fire Pump Room Design Checklist Read More »
How to connect a yard hydrant to a private fire main: tee and 150 mm branch, isolating valve, thrust restraint, frost depth, outlet height, flushing and hydrostatic test.
Fire Hydrant Connection to the Fire Main (NFPA 24 Practice) Read More »
Where to put a fire department connection and how to pipe it: access side, 30 m to a hydrant, 0.45–1.2 m inlet height, system-side connection, check valve, ball drip and signage.
Fire Department Connection (FDC): Location and Arrangement Read More »
How to build a fire alarm cause and effect matrix from the fire strategy: rows of inputs, columns of outputs, clear actions in every cell, lift and suppression logic, sign-off and testing.
How to Write a Fire Alarm Cause and Effect Matrix Read More »
Size a heating expansion vessel in five steps from system volume, maximum temperature, static height and safety valve setting, with a worked 200 kW example, a quick house check and the site settings that matter.
Expansion Vessel Sizing for Heating Systems Read More »
Key fire alarm design values under EN 54 / CEN/TS 54-14 and NFPA 72 side by side: detector coverage, call points, sound and visual alarms, zoning, cabling and standby power.
EN 54-14 vs NFPA 72: Fire Alarm Design Differences Read More »