RBU150A3 - Switch Generac - Free user manual and instructions
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| Product Type | Manual Transfer Switch |
| Model | RBU150A3 |
| Brand | Generac |
| Amperage Rating | 150 A |
| Voltage Rating | 120/240 V AC |
| Phase | Single-phase |
| Enclosure Type | NEMA 3R (Rainproof) |
| Short Circuit Current Rating | 10,000 A |
| Number of Circuits | 10 to 12 circuits (typical) |
| Wiring Configuration | 3-wire (L1, L2, N) plus ground |
| Dimensions (H x W x D) | 27.5 x 14 x 6 inches (approx.) |
| Weight | 30 lbs (approx.) |
| Material | Steel enclosure, powder-coated |
| Operating Temperature | -30°C to 40°C |
| Interlock Mechanism | Mechanical interlock to prevent backfeed |
| Included Accessories | Mounting hardware, instruction manual |
| Compatible Generators | Up to 150 A (36 kW max) |
| Certifications | UL 1008, CSA |
| Maintenance | Annual inspection of connections and contacts |
| Warranty | Limited 2-year |
Frequently Asked Questions - RBU150A3 Generac
What does the RBU150A3 transfer switch do?
It safely switches your home's electrical load between utility power and a standby generator during an outage, using a manual interlock to prevent backfeed.
How do I install the RBU150A3?
Installation should be done by a licensed electrician. It mounts outdoors on a wall, connected to your main panel and generator via hefty gauge wires as per local codes.
Can I use this switch with any generator?
It's designed for generators up to 150 A (approximately 36 kW). Your generator must have a compatible breaker and matching voltage (120/240V).
Does the RBU150A3 include a cover or is it open?
It comes with a rainproof NEMA 3R enclosure and a hinged cover for safe outdoor operation.
How many circuits can I connect?
The switch accommodates 10 to 12 branch circuits (typical), depending on your load calculation and breaker sizes.
What maintenance does the switch require?
Inspect annually for loose connections, corrosion, and ensure the interlock mechanism moves freely. Clean with a dry cloth.
Is the RBU150A3 UL listed?
Yes, it is UL 1008 listed and CSA certified, meeting safety standards for transfer switches.
Can I operate the switch manually?
Yes, it's a manual transfer switch. You flip the main handle to choose between utility or generator power.
What is the short circuit current rating?
The switch is rated for 10,000 A short circuit current, which is standard for residential applications.
Where can I find the wiring diagram?
The installation manual included with the switch provides detailed wiring diagrams. You can also download it from Generac's website.
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USER MANUAL RBU150A3 Generac
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Product information
Brand : Generac
Model : RBU150A3
Category : Switch