Distributed power, no bus, no code

Ben Ellison

Ben Ellison

Panbo editor, publisher & chief bottlewasher from 4/2005 until 8/2018, and now pleased to have Ben Stein as a very able publisher, webmaster, and editing colleague. Please don't regard him as an "expert"; he's getting quite old and thinks that "fadiddling fumble-putz" is a more accurate description.

10 Responses

  1. DefJef says:

    What a neat wiring job. WOW. What I would like to get are all those neat little wire labels. Do you know a source for same? Adding them to an existing wiring system probably means doing new connectors unless, they can be added to existing wires with terminals and that would be ideal.
    I did some for large cables by printing on paper and sealing them with clear heat shrink, but for the small stuff this seems hardly do able.
    No service loops on most of this wiring either.
    sv shiva

  2. Mark Read says:

    I’m looking at those cirucuit boards and wondering what a stray bolt of lightning would do to the whole system. Would this type of setup limit where you could safely travel because of electrical storms?

  3. Dan Gingras says:

    The wire labels were probably done by a Kroy Labeler which produces cool shrink tube with the printing on it. I have one and it’s really neat.
    Check it out here:

  4. Ben Ellison Ben Ellison says:

    Mark, I’ll ask George Wallner what he’s done for lightning protection (thanks!), but doubt he feels limited to where he can go. He seems to have thoroughly thought out what could go wrong with his systems.
    Thanks, Dan, I too have been wondering what made those nifty labels. I see the Kroy has a PC connection, which must help a lot with a boat like Electra. I’d guess that there are over ten thousand cable and wire labels!

  5. Steve says:

    I would like to see a picture of the other side of the panel. Squinting at the back, it looks like he has led’s for circut on, breaker tripped and so, as well as on-off switches.
    It would also be interesting to see a cost comparison of this arrangement (labor included) with Calder’s “three wire boat”.

  6. KevinH says:

    Check out the Dymo Labeler with Marine Labels. West sells them. The labels stay on-I tested them in snow, sun, rain-they are great.

  7. George Wallner says:

    Lightning protection on boats is a huge subject that I do not want to get into. Lets just say that there could two types lightning “hits”: Catastrophic direct hit and high surge (caused by a near miss that induces very high currents and voltages into on-board wiring). What happens during a direct hit on a composite boat is anybody’s guess, but not being able to turn on the lights in the head would be my least concern. A high surge hit — by far the most likely occurance — would fry any electrical and electronic systems that did not have adequate surge protection.
    Electra’s load switching system incorporates three layers surge protection: each solid state relay/circuit breaker module has its own built in surge protection, all control wiring is ran in shielded cables whose shields are tied to an extenstive low impedance grounding system, and each control panel has its built-in surge protection. Furthermore, the signal that actuates the solid state relay/circuit breaker is generated by a mechanical switch: no intervening electronics that could get fryed. By the way, the solid state relay/circuit breakers are automotive relays: they are very (very) sturdy. And if all that fails, one can simply remove a relay/breaker module and jumper the terminals.

  8. Sandy says:

    Airmar will release a sailing catamaran-compatible ultrasonic wind instrument, the PB200 in October. It will feature a 3D gyro, GPS and extensive wind data, and will be available with either Nmea 0183 or Nmea 2000 interfaces. Yummy!

  9. Michael Wilson says:

    Ben et al – a question from a novice. I have read of the ‘3 wire boat’ and think I understand the goals and aims of this type of electrical system. What I am less clear on is the overlap (if any) between the NMEA2000 standard or devices. How do these two systems overlap – or compliment each other? Any help here would be much appreciated.
    Regards, Mike

  10. Ben Ellison Ben Ellison says:

    Mike, I’m not completely up on this, but my understanding is that NMEA 2000 can be the control “wire” in a three wire system, but it certainly doesn’t have to be.
    N2K/CANbus may be too much complication and expense if the only data passing back and forth is “Turn On/Off” and maybe “Current Load”. Then again, consider what can happen if power info and control is on the same bus with a boat’s navigation and engine data.
    A good example, I think, are the off boat security systems that alarm you about various problems and let you control some items like lights and AC from your home or phone. Their complexity and cost will drop mightily once all this stuff lives on a common bus (or buses), while reliability and features improve.

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