01 Pre-Work Safety Checklist
📋 Before Starting Any Field Work
Check PTW obtained for voltages above 50V AC / 120V DC
Inform SM before leaving HQ or entering track area
Verify isolation — test with approved voltage tester
Apply earthing clamps before touching any equipment
PPE ready — safety shoes, helmet, gloves, goggles
First Aid kit in work vehicle / bag
Fire extinguisher accessible at site
Emergency numbers noted — 108, SM, SSE/JE contact
⚡ Additional for RE Area Work
PTW obtained from TRD SSE for TSS/SSP/SP area
Confirm 2m clearance from OHE conductors
Insulating boots worn
Insulating mat placed at work location
No metallic tools / objects held above shoulder near OHE
Minimum 2 persons for all RE area work
TRD staff informed and present during cable work near track
02 Fire Extinguisher — At-a-Glance
| Extinguisher | Colour | ✅ Use On | 🚫 Never On | Telecom Use? |
|---|---|---|---|---|
| Water | 🔴 Red | Class A | B, C, D, E | ❌ No |
| Foam | 🟠 Cream | A, B | C, D, E | ❌ No |
| CO₂ | ⚫ Black | B, E (Electrical) | D (metals) | ✅ Yes — preferred |
| ABC DCP | 🔵 Blue | A, B, C, E | D (metals) | ✅ Yes |
| Wet Chemical | 🟡 Yellow | F (cooking) | A,B,C,E | ❌ No |
Telecom Equipment Fire — Always Use CO₂ or ABC DCP
CO₂ is preferred for enclosed equipment rooms — no residue, no damage. ABC DCP is backup for larger fires. Remember PASS: Pull · Aim at base · Squeeze · Sweep
03 CPR Quick Reference Card
CPR — ADULT (ON FIRM SURFACE)
Step 1Check safety → Check response → Call 108
Step 2Open airway — head tilt, chin lift
Step 3Check breathing (max 10 sec)
Step 430 chest compressions — 5–6 cm deep, 100–120/min, full recoil
Step 52 rescue breaths — head tilt, seal, 1 sec each
Step 6Repeat 30:2 for 5 cycles (~2 min), then reassess
SwitchChange rescuer every 2 min to avoid fatigue
04 Memory Aids
MNEMONIC
Fire Triangle — FHO
"Fuel Heat Oxygen make fire" — remove any one to extinguish
MNEMONIC
Fire Classes — ABCDEF
Ash (solids) · Blazing liquids · Combustible gas · Dangerous metals · Electrical · Frying oils
MNEMONIC
Extinguisher Use — PASS
Pull pin · Aim at base · Squeeze handle · Sweep side to side
MNEMONIC
Emergency Response — DR ABC
Danger · Response · Airway · Breathing · Circulation
NUMBERS
CPR Numbers to Remember
Ratio: 30:2 · Rate: 100–120/min · Depth: 5–6 cm · Start within: 4 min
NUMBERS
Voltage Safety Limits
Safe: below 50V AC / 120V DC
OHE: 25,000V — lethal at 2m
Telecom: 48V DC
OHE: 25,000V — lethal at 2m
Telecom: 48V DC
REMEMBER
Electric Shock — First Step
NEVER touch victim if still in contact with live source. ISOLATE SUPPLY FIRST. Then assess. Then CPR.
REMEMBER
Burns Treatment Rule
1st/2nd degree: Cool water 10–20 min. Never ice, never butter. 3rd degree: DO NOT use water — cover loosely, call 108.
⚡ ONE-LINER RECAP CARDS — ST-02
What type of extinguisher for electrical fire?
CO₂ (Black) or ABC DCP (Blue). Never water.
OHE voltage on Indian Railways?
25 kV AC single phase 50 Hz. Safe distance: 2 metres.
What is PASS?
Pull pin · Aim at base · Squeeze · Sweep — method to use extinguisher.
CPR ratio for adults?
30 compressions : 2 rescue breaths at 100–120/min.
First step in electric shock response?
Isolate power supply — do NOT touch victim while live.
What does AFDAS stand for?
Automatic Fire Detection & Alarm System.
Minimum voltage requiring PTW?
50V AC or 120V DC and above.
What is DR ABC?
Danger · Response · Airway · Breathing · Circulation — emergency protocol.
Class E fire involves what?
Electrical equipment — use CO₂ or DCP, never water.
AFDAS backup battery standby duration?
Minimum 72 hours standby on battery backup.
Start CPR within how many minutes?
Within 4 minutes for best outcome — brain damage starts at 4–6 min.
Standard for fire detection systems in India?
IS 2189 — Indian Standard for fire detection and alarm.