GNF221A – Product Description
🔌 What it is
The GNF221A is a Siemens General Duty non-fused safety disconnect switch used to manually shut off power to electrical equipment for servicing or emergency isolation.
It is not a circuit breaker—it is a disconnect switch installed near equipment.
🧾 What the model means
-
GNF → General Duty, Non-Fused disconnect
-
221 → 2-pole, 2-wire (240V single-phase)
-
A → Series designation
⚡ What it does
This device:
- Provides a manual ON/OFF disconnect for 240V equipment
- Allows safe shutdown before maintenance or repair
- Does not provide overcurrent protection (no fuses inside)
- Must be protected upstream by a breaker in the panel
Manufacturer specs identify it as a 30A, 240V, 2-pole non-fused general duty safety switch.
🏠 Typical uses
- HVAC condenser disconnects
- Water heaters
- Well pumps
- Small motors and equipment
- Appliance service disconnects
🧠 Simple explanation
This is a 30-amp wall-mounted safety switch that lets you manually shut off power to equipment for servicing, but it does not trip like a breaker and does not contain fuses.
🔧 Key takeaway
- 2-pole = 240V equipment
- Non-fused = no built-in overcurrent protection
- Used as a local shutoff / safety disconnect
- Must be paired with a breaker upstream in the panel
