David, keep in mind that you always want to protect the wiring (or actually, against the wire failure (short)).
I wood recommend installing fuses directly on the battery terminals (have a look at this: http://ca.binnacle.com/product_info.php?products_id=8934 ). There are also fuse blocks like that with two fuses attached (you can put different fuses on each terminal, e.g. a 200 A on the starter circuit and 20 A for the accessories (or the solar panel)). If I remember correctly, ABYC requires that all battery cables are protected within 7 in. from the battery (why 7 and not e.g. 6?). These fuse blocks protect the wires within the first inch. The only problem you may find is that they add a little bit to the height of the battery, so if you don’t have enough clearance above the battery, you may need a different solution. Marek (in Ottawa) From: Prime Interest Sent: Thursday, April 10, 2014 9:40 AM To: cnc-list@cnc-list.com Subject: Re: Stus-List wiring projects In both cases the properly sized fuses protect the circuit wiring in the event of short circuit and protecting the attached component. In your first example a small amperage inline fuse is protecting the smaller/finer electronic wiring and the monitor component. Your breaker is likely a 15A one which could easily risk overheating or fire on a small gauge wire. In the second example, similar discussion but here there is no breaker in the picture and ABYC requires fusing of all circuits connected to the batteries. Again this protects the wiring assuming the wiring is sized to handle up to the 30A limit – check various sites to ensure your wiring is sized correctly based on the length of the run ... One could debate whether another fuse is required closer to the solar panel side also … I think getting some in-line fuses/holders is the easiest for both of these projects. ed From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of David Knecht Sent: Thursday, April 10, 2014 8:41 AM To: CnC CnC discussion list Subject: Stus-List wiring projects I have two wiring projects to complete this weekend and I have questions about fuses: 1. The holding tank monitor I bought from Fred shows a fuse being wired between the power source and the monitor gauge. Since the power is coming from a breaker on the main panel, is there any reason to add this fuse as well? 2. I am also wiring my new solar panel to a Sunsaver Duo controller and then to the two batteries. Their diagram shows a 30A fuse wired between the Duo and each battery. They did not supply these fuses with the kit. Is there a rationale for those fuses? Thanks- Dave David Knecht Aries 1990 C&C 34+ New London, CT -------------------------------------------------------------------------------- _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com
<<image001.png>>
_______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com
