James,
Thanks for the note. I did not know the ABYC E-11 existed. That's great. The voltage I believe is going through the contactor and not directly through the key switch--but the key switch activates the contactor, if I'm not mistaken. There is a fuse on the Gen4 (http://www.electricautosports.com/files/imagecache/product_full/dsc_0561.jpg) that connects the + to the B+ terminals. Is this sufficient?
Thank you!
Bradley
--- In electricboats@yahoogroups.com, James Sizemore <james@...> wrote:
>
> All sections of the ABYC E-11 should be followed on your boat at all times. You can get a copy from there web site for a 150 bucks or something like that. The Sections that cover your question would be below, basically you need a fuse or circuit breaker rated for the size of wire you are using. Also you should not run the voltage for your motor through a key switch but use a solenoid. A battery connector would not hurt, but would also no provide over current protection. Run not walk to the local marine store and buy some form of over current fuse for your bank if you do not already have one.
>
> 11.12.1. FOR DC SYSTEMS
> 11.12.1.1. Battery Charging Sources
> 11.12.1.1.1. Each ungrounded conductor
> connected to a battery charger, alternator, or other
> charging source, shall be provided with overcurrent
> protection within a distance of seven inches (175mm)
> of the point of connection to the DC electrical system
> or to the battery.
> EXCEPTIONS: 1. If the conductor is connected
> directly to the battery terminal and is contained
> throughout its entire distance in a sheath or
> enclosure such as a conduit, junction box, control
> box or enclosed panel, the overcurrent protection
> shall be placed as close as practicable to the battery,
> but not to exceed 72 inches (1.83m).
>
>
> 11.12.1.3. Motors or motor operated Equipment -
> Motors and motor operated equipment, except for
> engine cranking motors, shall be protected internally
> at the equipment, or by branch circuit overcurrent
> protection devices suitable for motor current. The
> protection provided shall preclude a fire hazard if the
> circuit, as installed, is energized for seven hours under
> any conditions of overload, including locked rotor.
> NOTES: 1. It may be necessary to use thermally
> responsive protection devices on the equipment or
> system if the motor is not capable of operating
> continuously at maximum possible loading.
> 2. It may be necessary to test as installed in order to
> assure compliance with the locked rotor requirement.
> Voltage drop, due to wire size, and delay
> characteristics of the overcurrent protection device
> may have to be adjusted to protect the motor.
>
> 11.12.1.5.1. Each ungrounded conductor of a
> branch circuit shall be provided with overcurrent
> protection at the point of connection to the main
> switchboard unless the main circuit breaker or fuse
> provides such protection.
> 11.12.1.5.2. Each fuse or trip-free circuit
> breaker shall be rated in accordance with E-11.12.1.3
> and E-11.12.1.4 and shall not exceed 150 percent of
> the conductor ampacity in TABLE IV . (See FIGURE
> 15.)
>
>
>
>
>
> On Sep 8, 2012, at 4:05 PM, semicolonsutra wrote:
>
> > Hi,
> >
> > I finally got my ThunderStruck ME0913/Gen4 connected up on my 6ton wooden sailboat. I've got 4 110Ah 12V batteries connected in series. Since I just got the motor running for the first time yesterday I was a little apprehensive leaving the boat with everything connected so I carefully disconnected the Gen4 from the power supply and made sure that the + && - terminals leads were on opposite sides of the boat, so to speak. I'm wondering though what are the best practices for safety regarding battery hookups to the engine. Should I run the circuit through a "1/2/all" type battery switch or is it ok to have the only switch be the ignition key/contactor? In general I just want to be able to leave the boat at the end of the day with some assurance that a fire is not going to ensue. Any advice on safety best practices would be much appreciated.
> >
> > Cheers,
> >
> > Bradley
> >
> >
>
No comments:
Post a Comment