MT Journeyman Electrician case studies
MT Journeyman Electrician · Put your knowledge to work in context.
The Montana Journeyman Electrician license is the credential that lets an electrician work unsupervised on electrical installations in the state, once the required hours of supervised experience and the licensing steps set by the Montana Board of Electrical Examiners have been met. It is aimed at electricians who have completed their apprenticeship or accumulated equivalent field experience and are ready to take responsibility for code-compliant work. The MT Journeyman Electrician case studies are 5 cases and about 3,089 words.
1Kitchen Multiwire Branch Circuit Neutral Current
A 1978 ranch kitchen is being remodeled, and the existing 12/3 NM cable from the panel to a four-gang box supplies two 20-ampere, 120-volt circuits. The two breakers are in positions 2 and 4, so they are on opposite legs.
611 words, about 3 min2Rooftop PVC Run to Condenser Disconnects
A 12-unit apartment building has a 60-foot rooftop conduit run from a house panel to four condenser disconnects. The electrician proposes 1-inch Schedule 40 PVC, supported every 10 feet, with three 8 AWG THWN-2 copper current-carrying conductors and a 40-ampere breaker.
598 words, about 3 min3Service Replacement Grounding and Bonding
A 200-ampere, 120/240-volt single-phase service is being replaced in a 1960s house. The service-entrance conductors are 3/0 copper.
604 words, about 3 min4Dwelling Service Calculation with EV Charger
A 1,800-square-foot single-family dwelling is served by a 120/240-volt, 200-ampere service. The standard-method load includes a 12 kW electric range, a 5.5 kW electric dryer, a 4.5 kW water heater, and a 4-ton heat pump with a 6,000 VA outdoor unit and air handler combined.
636 words, about 3 min5Condenser Replacement on Existing 10 AWG Circuit
A 3-ton air-conditioner condenser is being replaced with a 4-ton unit. The new nameplate reads minimum circuit ampacity 27.5 A, maximum overcurrent protective device 45 A, rated-load current 22.4 A, and locked-rotor current 112 A.
640 words, about 3 min