1. 💍 Jewelry OFF. Rings, watches, chains. Metal across a 48V terminal arcs, welds, and burns — and can ignite charging gases.
2. 🔒 The lockout ritual, IN ORDER: Tow/Run to TOW → key OFF → disconnect main NEGATIVE first (reconnect it LAST).
3. 🛠 Insulated tools near live packs — a chrome wrench is a welding rod with a handle.
4. 📟 Never ohm a live circuit. Ω and continuity are DEAD-circuit tests. Volts for live circuits.
5. 💨 Charging = hydrogen. Ventilate, no sparks or flame, keep it under 2% in air.
6. 🥽 Acid = PPE + eyewash. Splash → flush 15 minutes, get medical help.
7. 🛞 A jack LIFTS. A stand HOLDS. Chock what stays down, frame rails only, stands before any body part goes under.
8. 🏋 Batteries weigh 60–70 lb. Carrier or strap, legs not back, close to the body, no twisting. Lithium packs: two people or a hoist.
9. 🔥 Lithium swelling = quarantine. A lithium fire is not a water-extinguisher job — clear people, call it in.
10. 🌬 Gas carts: never run one in a closed bay. CO doesn't warn you.
11. 🧾 If it isn't written, it didn't happen. Every ticket gets the 3 C's.