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Dont do this

Posted by Peter Kennedy on 6/12/2016 to ABYC and USCG standards
Its a total No-No to connect AC Neutral to Ground on board a boat.  One boat did by accident, see what happened.......

ABYC standard for ELCI's explained

Posted by Peter Kennedy on 11/12/2015 to ABYC and USCG standards
ABYC standard for ELCI's explained
We all know that electricity and water don't mix.  What we may not be aware of is how many drownings occur every year because of electrical current in the water.  The new ABYC standard requiring ELCI circuit breakers on shore power service to boats is an attempt to reduce the amount of stray electrical current in the water - read below for an explanation of what this is all about.

Voltage drop tables

Posted by Administrator on 7/15/2015 to ABYC and USCG standards
I am always referring to these tables so I thought I would put them in my blog where they will be easier to find

Sizing wire for AC circuits

Posted by Administrator on 7/8/2015 to ABYC and USCG standards
This post gives a few pointers for sizing wire in AC Circuits

A comparison of ANL and MEGA fuses

Posted by Peter Kennedy on 6/19/2015 to ABYC and USCG standards
ANL and MEGA fuses are similar high amperage DC fuses but there are some big differences. Here is a comparison.....

An explanation of the interrupt rating for circuit breakers and fuses

Posted by Peter Kennedy on 1/9/2014 to ABYC and USCG standards
In extreme cases a fuse carrying an excessively high current can vaporize and the metal can be deposited on the base of the fuse block in a way that permits it to continue to carry current. Similarly with circuit breakers, if the level of fault current goes above a certain level the circuit breaker can become inoperable while still conducting current. Fuses and circuit breakers all have an interrupt rating which is a measure of the current that a circuit breaker can safely disconnect in the event of a fault. The interrupt rating may be different for AC and DC and may vary at different voltages..........

When and where do we need to install a battery switch?

Posted by Peter Kennedy on 1/8/2014 to ABYC and USCG standards
The ABYC standards say that a battery switch is required for all DC systems. One of the main reasons is that if a fault such as an electrical fire is discovered the system can be turned off quickly and easily. However certain circuits are exempt from the requirement to be protected by a switch. Do you know which ones?

Overcurrent Protection

Posted by Peter Kennedy on 11/5/2013 to ABYC and USCG standards
ABYC Standard 11.10 OVERCURRENT PROTECTION is a key section of the standards. The principal is very clear, an overcurrent device, such as a fuse or circuit breaker, needs to be placed within seven inches of where the conductor is connected to the source of power. The overcurrent device is protecting THE WIRE from carrying more current than it is able. What follows is an outline of this part of the standard but please see the disclaimer at the end.

ABYC publishes new safety essentials iPhone App

Posted by Administrator on 11/1/2013 to ABYC and USCG standards
This iPhone app won an award at the 2013 IBEX Show. "Boat Essentials" is used to file a float plan or to check, suggest and schedule maintenance of the safety equipment on your recreational boat

USCG standards for Electrical Systems on boats

Posted by Peter Kennedy on 10/28/2013 to ABYC and USCG standards
Federal Regulations on electrical systems for boats are covered by 33 CFR 183.401-460. The regulations, although mandatory, are somewhat limited in scope. They are available for free online:  33 C.F.R. PART 183—BOATS AND ASSOCIATED EQUIPMENT  In addition the ABYC has published a booklet explaining and simplifying the rules. What follows here is a brief discussion of the material covered by the regulations, please see the disclaimer at the end.

An outline of ABYC Standards for Electrical Systems

Posted by Peter Kennedy on 10/23/2013 to ABYC and USCG standards
This is an outline review of the ABYC standards relating to Electrical Systems. It just highlights the subject area of each standard. Further Blog Posts will delve into the details of the standards. The ABYC standards are a voluntary set of standards written and maintained by the American Boat and Yacht Council. They cover the design, manufacture and outfitting of small craft built in the US and compliment the compulsory standards written by the US Coast Guard. Each ABYC standard is updated every five years.  The USCG standards are covered in a separate Blog post.

ABYC standard for installation and wiring

Posted by Peter Kennedy on 10/22/2013 to ABYC and USCG standards
ABYC standard E11 covers AC and DC wiring on boats. In this post we are going to look at one small part of the standard relating to installation. In particular this standard refers to how electrical conductors should be routed and supported. In the standard its referred to as 11.14.6 Installation-General