Load
Review how the Raymarine EV-100 Wheel T70152 connects, how it operates and which installation requirements apply to this model.
Open this example as a new project. Use your own parts and cable lengths to make the plan yours.
This pack combines the ACU-100, wheel drive, heading sensor and control head. Drive-circuit cable sizing depends on the combined battery-to-ACU and ACU-to-drive length. Follow the complete power, motor and SeaTalkng network diagrams for the pack.
This pack combines the ACU-100, wheel drive, heading sensor and control head. Drive-circuit cable sizing depends on the combined battery-to-ACU and ACU-to-drive length. Follow the complete power, motor and SeaTalkng network diagrams for the pack.
Wiring diagram
Open this example in Crimp to use your own parts and cable lengths. Review the assumptions and installation notes as you adapt the circuit.
Installation notes
Guidance for this model, with sources linked beside the relevant advice.
Verified against the manufacturer's documentation (rev. Evolution installation 87180 Rev 7, 07/2024; EV-1 installation 87472 Rev 2), checked 2026-10-01. Manufacturer documentation →
T70152 is the EV-100 complete wheel-pilot pack with an EV-1 sensor, ACU-100 actuator controller, wheel drive and p70s control head. Other pack numbers omit the controller or drive. Raymarine rates this wheel system for suitable sailboats up to 7,500 kg fully laden displacement; steering condition and installation geometry remain part of choosing the drive.
The ACU-100 is a 12 V unit, with a 10.8–15.6 V operating range. Protect its supply with the manufacturer's 10 A inline fuse or 10 A thermal breaker. Its internal 10 A blade fuse does not replace protection for the cable from the distribution panel. Connect the specified power and ground conductors, then the separate motor output and network spur according to the ACU diagram.
ACU-100 does not power SeaTalk NG. The backbone feeding the EV-1 and control head needs its own single 12 V supply, specified as a 5 A inline fuse or 3 A thermal breaker in the network instructions. Do not add a second feed to an already powered backbone without a designed network power arrangement.
For a sailboat wheel drive, Raymarine's table uses A+B: the power-panel-to-ACU run plus the ACU-to-drive run. It specifies at least 2.5 mm² up to 3 m combined length, 4 mm² up to 5 m, 6 mm² up to 7 m, 10 mm² up to 10 m and 16 mm² up to 16 m. A generic calculator that sees only the first leg misses the drive-cable voltage drop.
The catalog symbol reserves the ACU supply; it is not a complete autopilot harness. The 7 A figure is the ACU's continuous drive-output capability, while 300 mA is ACU standby alone. Neither is the kit's normal steering consumption. Average draw and surge remain unset until an installation-specific budget is available; the terminal limit is the protection-based planning bound.
Mount the EV-1 in the correct vessel orientation and away from magnetic interference. Keep the ACU's connector area protected and provide access for inspection. Follow the wheel-drive instructions for its support, belt, clutch and clearances; electrical commissioning cannot compensate for binding steering.
Check manual steering and clutch release before engaging the pilot. Complete the supported dockside setup, verifying rudder direction and limits, then perform the controller's required on-water checks in open water with a competent operator ready to regain manual control. Unexpected steering calls for standby and investigation of direction, sensor alignment or mechanical load, not a larger fuse.
87180 Rev 7 manufacturer manual, distributor mirror, pp. 59–67 and 106, covers ACU wiring, protection, combined lengths and ratings. Current EV-1 instructions cover sensor/network installation; T70152 pack page confirms contents. Both installation PDFs are retained locally. Detailed wheel-drive mechanical and p70s operating procedures remain in their separate manuals.
Build it out
Add T70152 to your diagram, then connect your batteries, chargers and loads. Crimp calculates cable sizes and checks the connections as you draw.
Every cable you draw there is sized against ABYC E-11, from the same tables as the reference on this page.
Technical reference
Check the model, ratings and connection points against your own unit before choosing installation hardware.
Check stud sizes, fuse type, run length and how warm the space gets against the gear you actually have before you order.
Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.
ACU supply +
pos
positive · input
−
neg
negative · input
Method & provenance
Manufacturer specifications describe the equipment. Crimp calculates cable results from the circuit and assumptions you enter.
From the maker
Manufacturer, model, ratings and which terminal does what come from the catalog. A newer revision, or the nameplate on the unit in your hand, can say something different — when it does, the nameplate wins.
ABYC E-11
Sized against ABYC E-11. Boats built to UK or EU rules answer to ISO 13297 — check these figures against it before you build. The run length and the current above are what drive the result. Crimp doesn't know how warm your space gets; draw the cable inside an engine-bay zone on the canvas and it sizes for the heat.
Next step
Open this example as a new project. Add your equipment and cable lengths, then review the sizing and checks for your setup.