Menu
Blue Sea Systems
  • Products
    • Power Conversion
      • Battery Chargers
      • USB Chargers
      • Connectors
      • Dimmers
      • Air Brake Compressors
    • Automatic Charging Relay
      • Non-Critical Load Disconnects
      • Automatic Charging Relays
    • Battery Switches
      • Manual Battery Switches
      • Battery Management Panels
      • Remote Battery Switches
    • Solenoids
      • L-Series
      • ML-Solenoids
    • BusBars and Insulators
      • BusBars
      • Terminal Blocks
      • PowerPost Connectors
      • Feed Through Connectors
      • Insulators
      • Cable Clams
    • Fuses and Fuse Blocks
      • Fuses
      • Fuse Holders
      • Fuse Blocks
    • Circuit Breakers
      • Push Button Reset-Only
      • Medium Duty
      • 285-Series
      • 187-Series
      • A-Series
      • C-Series
      • ELCI and GFCI
      • UL-489
      • ATO-ATC Style Low Profile
      • Marine Grade Short Stop
      • Surface Mount System
      • Circuit Breaker Blocks
      • Accessories
    • Panels
      • DC Panels
      • AC Panels
      • ACDC Panels
      • Custom Panels
      • Panel Accessories
      • Labels
    • Meters
      • Analog Meters
      • Digital Meters
      • OLED Digital Monitors
      • Mini OLED Digital Monitor
      • Clamp
      • Shunts
      • Accessories
    • Switches
      • Contura Switches
      • Toggle Switches
      • Rocker Switches
      • Push Button Switches
      • Rotary Switches
      • Accessories
  • Where to Buy
  • Support
    • Technical Help
      • Articles
      • Reference
      • Documents
    • System Diagrams
    • Marketing Materials
      • Catalog
      • Apparel
      • Posters
      • Product Guides
      • Sales Sheets
      • Product & Price Lists
      • Product Images
    • Newsroom
      • Press Room
      • Newsletters
      • News Releases
    • ABYC C7 Compliance
    • Warranty Registration
    • Authorized Internet Reseller Program
  • About Us
  • Circuit Wizard
  • Panel Wizard
  • Order Labels
    • Browse Labels
  • View Catalog

Articles - Circuit Protection


Fuse/Circuit Breaker Speed Explained

Speed Delay Opening speed, or delay, defines the relationship between the percentage by which the fuse or circuit breaker is operating over ...
October 17, 2012

Independent Sourced Circuit ST Blade Fuse Block

The Independent Sourced Circuit ST Blade Fuse Block from Blue Sea Systems consolidates up to six independently-sourced branch circuits in on...
November 11, 2011

ELCI False Trips

The ABYC requirement for ELCI circuit breakers on all new boats with AC power has recently passed its first anniversary. Many units have bee...
October 13, 2011

285-Series Circuit Breaker Replaces Popular 185-Series Breaker at a Lower Price

The 285-Series Thermal Circuit Breaker is a direct drop-in replacement for the established 185-Series Thermal Circuit Breaker. The 285-Seri...
February 17, 2011

Blue Sea Systems Offers Solutions for Mounting ELCI Breakers to Comply With ABYC July 2010 Requirements

In response to a 2008 Coast Guard sponsored study entitled In-Water Shock Hazard Mitigation Strategy, ABYC standards now require boatbuilder...
February 17, 2011

The Safety Fuse Blocks (AMI®/MIDI® and MEGA®/AMG®)

The Safety Fuse Blocks from Blue Sea Systems are ignition and ingress protected and provide in-line fusing for a single circuit.The Safety F...
November 11, 2010

The SafetyHub 150 Fuse Block

The SafetyHub 150 Fuse Block from Blue Sea Systems provides fusing for ten circuits, and is the marine market's first ten-circuit 1A–2...
September 24, 2010

Broad Range of Fuses and Fuse Blocks From Blue Sea Systems

Blue Sea Systems is expanding its circuit protection offering, adding a broad range of low amperage fuses to complement the existing line of...
August 31, 2010

Part 2: Select a Fuse and Fuse Holder For Your DC Product Installation

This is the second in a two part series of technical briefs on circuit protection. Part 1 showed how to choose the correct wire size for DC ...
August 31, 2010

SMS: Surface Mount System

Since July 2010, ABYC standards require all new boats with a shore power connection to include ELCI whole-boat protection to guard against e...
August 01, 2010

Part 1: Choosing the Correct Wire Size for a DC Circuit

iOS Android Web Circuit Wizard Select the correct wire size, circuit breaker or f...
May 19, 2010

The SafetyHub 100 Fuse Block

The SafetyHub 100 consolidates and ignition protects seven 1A–200A circuitsThe SafetyHub 100 was developed in response to OEM, install...
March 25, 2010

Do You Have The Ignition Protection You Need on Your Boat?

Keeping sparks and flammable vapors apart is vital on a boat, and many boaters fail to consider all the hazards. Careless gasoline storage, ...
March 25, 2010

Mounting Options for ELCI/GFCI Circuit Breakers

Blue Sea Systems is pleased to offer ABYC–compliant single–pole 5mA branch GFCI and double–pole 30mA main ELCI circuit pro...
March 17, 2010

Two Below Deck Panels—Traditional Metal and 360 Panel System

Blue Sea Systems offers two choices for below deck electrical distribution panels—Traditional Metal and 360 Panel SystemBlue Sea Sys...
November 12, 2009

The SafetyHub 250 Fuse Block with Remote Battery Switch

A consolidated electrical system for a single battery boat. The SafetyHub 250 Fuse Block with Remote Battery Switch is an ignition protected...
October 23, 2009

MIDI®/AMI® Fuses

When evaluating available fuses for the SafetyHub family of products, Blue Sea Systems engineers discovered the compact and versatile MIDI&r...
September 28, 2009

24 Hour Circuit Solutions

With the growing demand for 24-hour circuits—such as for bilge pumps, alarms, clocks, and control circuits for remote battery switches...
April 18, 2008

ST (Screw Terminal) Blade Fuse Block - Features and Applications

Blue Sea Systems' ST Blade Fuse Block continues to be a best seller for good reasons. The features that it offers, and its low price per ci...
August 20, 2007

Fusing the Negative Circuit of ACRs and Other Electric Relays

Problem. Electric switches such as automatic charging relays (ACRs), battery combiners, load shedding devices, and zero-drop isolators a...
March 15, 2007

Windlass and Bow Thruster Relay Contact Chatter

Problem The relay contacts in windlasses and bow thrusters may chatter when they are switched ON and when they are switched OFF. This contac...
December 18, 2006

Flat Actuator Circuit Breaker Designs Provide Protection From Accidental Switching

Toggle actuated and raised rocker circuit breakers can be accidentally switched. While this could be only a nuisance in some situations, it ...
June 23, 2006

Choosing Circuit Protection

Blue Sea Systems' engineers identify new factors to consider when selecting high amperage circuit protection. Circuit protection devices are...
May 23, 2006

WeatherDeck™ Water Resistant Circuit Breaker Panels

WeatherDeck™ Water Resistant Circuit Breaker Panels are versatile enough to meet the needs of most boaters. They are available in four...
February 15, 2006

DC Circuit Protection

Electrical shorts are the number one cause of fires on boats. In fact, more than half of boat fires are electrical in origin. More than half...
December 23, 2005

DC Main Overcurrent Protection Requirements

ABYC standard E11.12.1.1.1 states that each ungrounded conductor connected to a battery charger, alternator, or other charging source, shall...
December 30, 2003

ST (Screw Terminal) Blade Fuse Block

The ST (Screw Terminal) Blade Fuse Block was designed with screw terminals to comply with ABYC Recommended Practices and built with tin plat...
December 30, 2003
Subscribe to Newsletter Contact Us Our Product Guarantee
Privacy Policy Terms of Use Accessibility Statement
Facebook Twitter
©2006-2026 Blue Sea Systems