IE RULES
Table of Contents
Overview
Below are concise, high-value one-liner rules & quick tricks from the IE rules / electrical safety & wiring rules that appear frequently in AE/JE style exams (RRB JE, State PWD AE, Municipal/SE boards). Each line is written for quick remembering and exam recall.
Key One-liner Points (Exam-focused)
- Definition: "Consumer" includes any person using electricity — remember: exam tip — used in AE/JE questions (RRB JE/State PWD). Mnemonic: C=Customer. (commonly in RRB JE)
- Licensing: Live-line work must be done only by licensed persons — frequently asked in AE papers as 'who is competent'. (AE/JE)
- Earthing: Every installation must have an independent earth electrode — trick: "Separate earth, safer start". (RRB JE / PWD)
- Fuse Rating: Fuse > protective device must be less than conductor rating — quick check question for JE practical exams. (State AE)
- Minimum clearances for overhead lines depend on voltage — memorize voltage bands and clearances as a table trick. (RRB JE)
- Permits: Written permit required for any high-voltage switching — exam loves permit/authority questions. (AE/JE)
- Maintenance: Periodic inspection frequency is set by type of installation — remember "Domestic: shorter checks than industrial" trick. (State PWD)
- Polarity: Reversed polarity causes hazardous circuits — easy MCQ in JE: identify reversed phase sequence. (RRB/JE)
- Protection: Overcurrent relays must be graded — memorize "co-ordinate & delay" for selective tripping questions. (AE/Relay papers)
- Transformer earthing: Neutral must be solidly earthed unless specified — common objective question in AE exams. (AE/JE)
- Insulation: Working near live parts requires insulated tools & PPE — often framed as "which PPE" in JE tests. (RRB JE)
- Color code: Phase, neutral, earth color coding is standard — exam likes to flip colors as trick options. (State AE)
- Isolation: Lock-out/Tag-out is mandatory for maintenance — short trick: LOTO = LOCK + TAG + TEST. (Safety Q in AE/JE)
- Voltage limits: Extra-low voltage exemptions exist — quick MCQ: what is ELV cutoff. (RRB JE / PWD)
- Test certificates: After new wiring, issue completion certificate — remember paperwork is as important as wiring. (AE/Inspector)
- Conductor sizing: Long runs need larger size to limit voltage drop — favorite applied problem in JE. (State PWD)
- Switchgear rooms: Must be secure, ventilated, and marked — simple checklist often asked in short answers. (AE/JE)
- Isolation distance for live testing: Minimum safe distance must be maintained — practical safety question. (RRB JE)
- Portable appliance testing: Earth continuity & insulation tests required — common maintenance MCQ. (AE)
- Neutral handling: Never disconnect neutral under load — trick Q: what causes neutral floating? (JE/AE)
- Earthing resistance: Should be low (often < 1–5 Ω depending on standard) — memorize range examples for quick recall. (RRB JE)
- Lighting protection: Surge arresters at service entrance protect internal wiring — exam often contrasts arresters vs fuses. (AE)
- Safety signage: Must be displayed near high-voltage equipment — short-answer favorite. (State AE/JE)
- Cable identification: Mark both ends and record in schematic — examiner-friendly maintenance tip. (AE)
- Testing sequence: De-energize → Isolate → Prove dead → Earth — memorize "D-I-P-E" for practical. (JE practical)
- Penalty & offences: Violating safety rules invites penalties — often appears in regulatory questions. (AE/Inspector)
- Record keeping: Logbooks and periodic test records are examinable — trick: "Logs = evidence for safety." (RRB/JE)
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