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Peter Kennedy has been in  business since 1991 designing, installing and servicing marine electrical systems. The purpose of this blog is to offer support to both professional installers and  do-it-yourself boat owners who wish to undertake this work themselves.
Peter Kennedy has been in  business since 1991 designing, installing and servicing marine electrical systems. The purpose of this blog is to offer support to both professional installers and  do-it-yourself boat owners who wish to undertake this work themselves.

Sourcing High Voltage DC Equipment

Posted by Peter Kennedy on 7/13/2018 to Circuit Protection
I get asked all the time about high voltage DC applications.  Most equipment we sell at PKYS tops out at 48 Volts DC rating, only a few items are rated higher, and quite a lot have lower ratings.  Finding equipment for high voltage applications is not that easy.  

ABYC standard for ELCI's explained

Posted by Peter Kennedy on 11/12/2015 to ELCI's
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.

Ampacity Tables

Posted by Administrator on 5/31/2015 to Electrical Standards
I end up looking up this table so often I decided to post it on my blog

Isolation Transformer or Galvanic Isolator - which is preferable?

Posted by Peter Kennedy on 10/24/2014 to Corrosion
A discussion on the relative merits of transformers and galvanic isolators

Help - my batteries are getting HOT!

Posted by Peter Kennedy on 1/24/2014 to Battery Chargers
Help!  My Batteries are getting hot!  What should I do?

Circuit Breakers vs Fuses

Posted by Peter Kennedy on 1/13/2014 to Circuit Protection

Circuit Breakers vs Fuses, the Presidential Debate. Who to vote for? This short article will look at this debate in the context of two very similar switch panels by Blue Sea Systems. The Blue Sea Systems 4306 WeatherDeck switch panel with fuses is almost identical to the 4376 switch panel with circuit breakers. Which should you choose?


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

Posted by Peter Kennedy on 1/8/2014 to Electrical 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 Circuit Protection
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.

Simple AC circuit tester

Posted by Peter Kennedy on 10/20/2013 to Safety
AC circuit testerI carry this simple and inexpensive AC circuit tester on every job too

Non Contact AC Voltage detector

Posted by Peter Kennedy on 10/19/2013 to Safety
I carry this little gizmo on every job I go onFluke non contact AC Voltage detector