Power source
Review the SmartPlug BM30NT 30A 125V Inlet catalog ratings, AC connection points and installation notes, then add the part to your Crimp diagram.
Open this example as a new project. Use your own parts and cable lengths to make the plan yours.
Opening this part in Crimp starts a new project with the equipment placed on its own. Use the manufacturer documentation to plan its AC connections and protective devices.
The map identifies line, neutral and protective-earth connections. This page does not calculate an AC cable size or protection rating.
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.
Reviewed against manufacturer family documentation (rev. SmartPlug Marine Catalog 2025; BM30 non-metallic family installation sheet 01/26/2017), checked 2026-10-01. Exact variant details still require confirmation. Manufacturer documentation →
BM30NT is the stainless 30 A / 125 V SmartPlug boat-side inlet identified in the current marine catalog. In a nominal 120 V shore installation, it accepts the matching SmartPlug boat-end connector. The marina end of the cord must separately match the pedestal. This inlet does not turn AC into 12 V DC; a charger or other converter is a separate downstream component.
The three canvas connections represent AC line, neutral and protective earth. Their 30 A limits come from the product rating. They must not be wired as a positive/negative DC pair, and protective earth is not a normal load-current return. The symbol marks the shore entry point rather than a complete shore-power safety system.
Plan the inlet-to-main-panel cable, disconnect/overcurrent protection and ground-fault protection as an AC installation. The 30 A inlet rating is an upper limit, not a guaranteed available load or permission to up-rate an existing cable. Confirm source voltage, correct conductor identity and the vessel's complete grounding arrangement before energizing. Do not create a neutral-to-earth link at the inlet as an improvised substitute for an established system design.
De-energize and disconnect the shore cord before installation. Inspect the existing conductors for heat damage or corrosion rather than transferring damaged ends into a new inlet. Use the correct mounting gasket, support the cable and provide the specified rear enclosure/strain relief. Check plug fit and full engagement of the locking features before restoring power.
The recovered installation sheet is for the non-metallic BM30 family, while this component is stainless BM30NT. It shows color-coded hot, neutral and ground connections, but is not exact-part evidence for BM30NT stripping length, terminal torque, conductor acceptance or rear hardware. Those details must come from the instructions supplied with this exact inlet. Verification therefore remains family-only for installation mechanics; no borrowed torque has been published as an NT specification.
With the completed installation inspected, verify polarity and the operation of the installed protective devices using their instructions. Connect and disconnect with the shore supply turned off so the inlet is not being used as a load-breaking switch. Ensure the boat-side connector fully locks and the cover engages as intended.
Investigate warmth, discoloration, arcing marks, damaged seals or loose connections promptly. A larger breaker does not repair a resistive contact. Keep contacts clean and dry and support the shore cord so its weight and movement are not carried by the electrical connection alone.
Official 2025 marine catalog, p. 12, confirms BM30NT and 30 A / 125 V. Manufacturer BM30 non-metallic installation sheet, distributor mirror is retained as family evidence only. The exact NT terminal procedure remains an explicit gap in the ledger.
Build it out
Add BM30NT 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.
AC L
ac-l
neutral · output
AC N
ac-n
neutral · output
AC PE
ac-pe
ground · bidi
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.