Re: [electricboats] Question about bus bar safety

Printed plastic labels have a tendency to peel off. Leaving you clueless.

When they ARE in (the correct) place, it is good !

I bought a swedish boat, labelled extensively by the former DIY owner.

But some were peeled off, some showing wrong. In swedish, of course, but no problem for me.

I decided not to trust those labels.

In general, less that 70V is not considered "dangerous" in a EE's mind.

So. just tell your coming new owner of your carefully designed DIY boat, that there are more than the usual 12V or 24V system onboard.

That'll jusitfy the use of a multimeter - you're so right, Ryan !

(I'll design my upcoming 48V 12KW motor and battery system to be possible to deliver 96V to the motor. "Nitro" electric, for emergencies !)

I would make a printed documentation of the system (sealed ?), to follow the boat documents.

Then your back is free. New owner has to read all docs before using the boat,right ?

Carsten

On Tuesday, 30 March 2021, 03:08:36 GMT+8, Ryan Sweet <ryan@ryansweet.org> wrote:

That's a good one, I'll make good use of the label maker this week. ;-) I'm going to add "always use a multimeter to verify your assumptions about the circuit before beginning work."

On Mar 29, 2021, at 12:00, Daniel Michaels via groups.io <nov32394=yahoo.com@groups.io> wrote:



A general warning at the electrical panel stating that "This boat has 12 and 48 volt buss bars.

Dan

On Monday, March 29, 2021, 12:27:51 PM MDT, Mike hurley via groups.io <redwood1957=yahoo.com@groups.io> wrote:

Seams as if there should be color codes for ac/ DC48 and dc12 for pos/ and neg

On Sat, Mar 27, 2021 at 2:03 PM, Ryan Sweet

<ryan@ryansweet.org> wrote:

Typo, hopefully obvious

"48v or 12v"

Why do we still use asdf keyboard layouts on thumb driven mobile phones? Sigh.

> On Mar 27, 2021, at 10:57, Ryan Sweet via groups.io <ryan=ryansweet.org@groups.io> wrote:

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> For those of you that have 12v systems and 48v systems, is there a standard or convention for making it really clear that a given bus bar is 48v or 12c?

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> Mine are in very different places in the boat and I've taken to putting plastic covers over the top and then taping really big labels on them and updating the drawings kept on board (still I'm trying to think of someone working on the boat with no drawing and no history of the installation etc). I know they could and should check with the multimeter but I also feel an obligation to protect a future diy boat owner from themselves if they fail to do that. Hence, wondering if there is some convention.

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