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DISCONNECT SWITCHES

# Disconnect Switches - HVAC Safety Disconnects

Shop AC disconnect switches, fuse pullouts, and safety disconnects for air conditioning and HVAC equipment. We stock fused and non-fused disconnects in all common amp ratings at our Westland, Michigan warehouse.

## Why Buy Disconnects From Technical Hot & Cold?

**Complete Selection**
Fused pullouts, non-fused disconnects, and safety switches in 30A, 60A, and higher ratings.

**Weather Resistant**
Outdoor-rated NEMA 3R enclosures built to withstand the elements.

**Same-Day Shipping**
Disconnect switches in stock ship today when ordered before 3PM EST.

**Code Compliant**
UL listed disconnects that meet NEC requirements for HVAC installations.

## Types of Disconnect Switches

### Fused Pullout Disconnects
Most common for residential AC.

**Features:**
- Pull-out fuse block
- Removable for service lockout
- Fuses provide overcurrent protection
- NEMA 3R outdoor rated
- Knockout for conduit

**Advantages:**
- Provides circuit protection
- Easy on/off operation
- Code compliant
- Economical

**Amp Ratings:**
- 30 amp (small AC units, 1-2 ton)
- 60 amp (most residential, 2-5 ton)

### Non-Fused Disconnects
Switch only, no fuse protection.

**Features:**
- Pull-out switch block
- No fuses (rely on breaker)
- NEMA 3R rated
- Lower cost

**When to Use:**
- When breaker provides protection
- Where fuses not required
- Per local code
- Cost-sensitive applications

**Note:** Check local code - some areas require fused disconnects.

### Fused Safety Switches
Heavy-duty with knife blade disconnect.

**Features:**
- Enclosed knife switch
- Visible blade position
- Fuse clips inside
- Commercial/industrial
- Various NEMA ratings

**Applications:**
- Commercial HVAC
- Industrial equipment
- Heavy-duty applications
- Where high visibility needed

## Disconnect Sizing

### How to Size:

1. **Find Equipment Amperage**
   - Look at condenser data plate
   - Find MCA (Minimum Circuit Ampacity)
   - Find MOCP (Maximum Overcurrent Protection)

2. **Select Disconnect Rating**
   - Disconnect amp rating ≥ MCA
   - Fuse rating ≤ MOCP
   - Common: 30A or 60A

### Common Sizing:

| AC Tonnage | Typical MCA | Disconnect Size |
|------------|-------------|-----------------|
| 1-1.5 ton  | 10-15A      | 30A disconnect  |
| 2-2.5 ton  | 15-20A      | 30A or 60A      |
| 3 ton      | 18-22A      | 60A disconnect  |
| 3.5-4 ton  | 20-28A      | 60A disconnect  |
| 5 ton      | 25-35A      | 60A disconnect  |

## Disconnect Installation

### Location Requirements:

**NEC Code:**
- Within sight of equipment
- Maximum 50 feet away
- Lockable (or within sight)
- Accessible for service

**Best Practices:**
- Close to condenser (3-6 feet)
- Away from exhaust airflow
- Accessible height
- Protected from damage

### Installation Steps:

1. **Turn Off Power**
   - Main breaker off
   - Verify no voltage

2. **Mount Enclosure**
   - Level on wall
   - Proper height
   - Secure mounting

3. **Run Conduit**
   - Line side (from breaker)
   - Load side (to condenser)
   - Proper fittings

4. **Wire Connections**
   - Line to top terminals
   - Load to bottom terminals
   - Ground properly
   - Torque to spec

5. **Install Fuses**
   - Correct amp rating
   - Per equipment MOCP
   - Both legs

6. **Test Operation**
   - Pull out = power off
   - Insert = power on
   - Verify with meter

## Disconnect FAQs

**Q: Fused or non-fused?**
A: Check local code. Fused provides additional protection. Non-fused relies on breaker only.

**Q: What size do I need?**
A: Check equipment data plate for MCA. Disconnect must equal or exceed MCA.

**Q: What fuse size?**
A: Check equipment MOCP. Fuse must not exceed MOCP rating.

**Q: Can I use breaker instead of disconnect?**
A: Only if breaker is within sight (50 feet) of equipment. Otherwise need local disconnect.

**Q: Why does my disconnect get hot?**
A: Loose connections, undersized wire, corroded contacts, or overloaded circuit. Investigate immediately.

## Need Help With Disconnects?

Contact us with your equipment amperage. We'll help you select the right disconnect!

- **Phone:** 734-326-3900
- **Email:** parts@technicalhotandcold.com
- **Location:** Westland, MI

Can't find what you're looking for?

If you don't see your model or part, call us! Our friendly technicians are standing by. We can help you find the part you need with guaranteed fitment. Speak with us today at (734) 326-3900.

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Need help? Speak with one of our technicians at (734) 326-3900