Module 1 · Chapter 1 · Free preview
Welcome to the Distribution System
Understand how power flows from substation to customer and the language used to describe it.
Key frames
- The distribution system is a tree: substation (trunk) → feeders (branches) → laterals → transformers → service drops → meters (leaves).
- Jamaica runs primarily radial systems at 24kV primary, stepping down to 110/220V at 50 Hz.
- A ‘qualified employee’ under OSHA 1910.269 needs both training AND demonstrated proficiency.
- Know the vocabulary: outage, fault, interruption, de-energized, energized, feeder, lateral, service drop.
- The beginner’s job is to be safe, observant and communicative — if you don’t know, ASK.
Apply it to your operation
Work these in your participant workbook — they become pages of your action plan.
- Trace one real feeder in your area from substation to a customer, naming the voltage at each stage.
- Write the five responsibilities of a beginning utility worker in your own words.
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