Attwood 14230-3 4-Way Battery Selector Switch 6-32V DC
14230-3
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Attwood 4-Way Battery Selector
OFF / Battery 1 / Battery 2 / BOTH | 6–32V DC
A single-pole, four-position marine battery selector for controlling two battery banks. Attwood 14230-3 provides OFF, Battery 1, Battery 2 and BOTH modes and includes an alternator-field disconnect circuit intended to reduce damaging switching surges when correctly wired.
Key Features
- Four switch positions: OFF, 1, 2 and BOTH.
- Two-bank control: Select either bank or parallel both banks when the system design permits.
- Alternator field disconnect: Additional circuit for compatible externally regulated charging systems.
- Positive detents: Clearly defined selector positions.
- Marine construction: Bakelite housing with copper/brass current-carrying components.
Technical Specs
| System voltage | 6–32V DC |
| Continuous rating at 6V | 300A |
| Continuous rating at 12V | 150A |
| Switch type | Single-pole, multi-position battery selector |
| Positions | OFF / 1 / 2 / BOTH |
| Alternator field disconnect | Included |
| 4Boats SKU | 14230-3 |
Compatibility / Fitment Guide
Electrical compatibility: For two-battery-bank DC systems between 6V and 32V when cable size, overcurrent protection, starter current and charging arrangement are within the published switch limits.
| Compatible system | One engine/charge system with two battery banks, or other single-pole layouts matching the Attwood wiring diagram. |
| Do not assume | Not automatically suitable for lithium batteries, dual-engine isolation, high-output alternators or loads above the voltage-specific rating. |
Never rotate through OFF while the engine is running unless the charging system and field-disconnect circuit are explicitly wired to permit it.
Part Number Cross Reference
| Attwood | 14230-3 |
| Compact numeric format | 142303 |
| 4Boats SKU | 14230-3 |
Frequently Asked Questions
Is this a 250A continuous switch?
The researched Attwood specification is 300A continuous at 6V and 150A continuous at 12V; the old 250A title has been removed.
Can it control two batteries?
Yes. It selects Bank 1, Bank 2, both banks in parallel, or OFF.
Can I use it on 24V?
The switch is described for 6–32V DC systems, but the permitted current at your voltage and the complete system design must be confirmed before installation.
Can I switch to OFF with the engine running?
Do not do so unless the manufacturer wiring instructions specifically permit it; interrupting an alternator under load can cause damaging voltage spikes.
Disconnect all power before installation. Battery switching involves very high fault currents; cable sizing, fusing, terminal protection and ventilation should be designed or checked by a competent marine electrician.
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