# Plan Rack Power and Capacity

Hardware orders fail in the PDU, not the spreadsheet — budget watts, uplinks, and growth before the crate arrives.

## Why it matters

An 8-node payments edge that exceeds PDU budget ships into a brownout. Headroom is a first-class capacity signal.

## Ticket focus

1. Power draw vs PDU headroom math
2. Dual uplinks + growth plan

## Tip codes

- `PDU_MATH` — draw vs budget
- `DUAL_UPLINK` — redundant edge uplinks
- `GROWTH_SLOT` — spare for the next servers