Instruction for "Not keeping Locomotives under IOL"

Technical

Circular Number: DCKP/CIR/TechEL/09-04-2026/10.244.207.211/1

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Not Keeping Locomotives under IOL

Mandatory Instructions for LPs
Important: LPs should strictly follow the instruction for not keeping locomotives under Insulated Overlap (IOL).

The circular issued by the Chief Electrical Distribution Engineer, S.E.R., dated 25.02.2026, instructs that caution boards must be installed at two locations before every Insulated Overlap (IOL), irrespective of the distance from the signal.

📋 Caution Board Specifications
Board Size 900 × 600 mm
Lettering White Retro-Reflective
Background Non-Retro-Reflective Red
Specification ETI/OHE/33A (12/97) Rev-8
Procurement RDSO/CORE-approved sources
⚠️ BOARD MESSAGE
“DANGER – DO NOT STOP ELECTRIC LOCO/MU IN INSULATED OVERLAP (IOL)”
Along with the applicable location number
👷 Compliance & Responsibilities
1
Loco Crews

Loco crews must be instructed through SrDEE/OP to follow the caution boards and avoid stopping electric locomotives/MUs under IOL.

2
Existing Boards

Existing boards that do not meet the specified requirements must be replaced.

3
Construction & Project Unit

The Construction & Project Unit must ensure compliance with all IOL caution-board provisions.

🚨 Safety Reminder: Electric locomotives/MUs must not be stopped under IOL. All LPs and concerned units shall ensure strict compliance.

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