Innovative Electrical Systems — Built to last
Air Brake Compressors
Automatic Charging Relay
Non-Critical Load Disconnects
Automatic Charging Relays
Manual Battery Switches
Battery Management Panels
Remote Battery Switches
BusBars and Insulators
Feed Through Connectors
Fuses and Fuse Blocks
Push Button Reset-Only
ELCI and GFCI
ATO/ATC-Style Low Profile
Marine Grade Short Stop
Surface Mount System
Circuit Breaker Blocks
OLED Digital Monitors
Mini OLED Digital Monitor
Push Button Switches
Where to Buy
Ask a Question
Product & Price Lists
Authorized Internet Reseller Program
Use the Blue Sea Systems Circuit Wizard to select the correct wire size, circuit breaker or fuse type and amperage, and fuse holder.
Get Started >
The Circuit Wizard app is available for
Use the Blue Sea Systems Panel Wizard to design and order a Custom 360 Panel.
Get Started >
Design a Custom 360 Panel using a worksheet, click to download worksheet.
Blue Sea Systems Catalog
Marine & Mobile Catalog
Can't find what you need?
to reach customer service Monday through Friday, 8am to 5pm Pacific Time.
Or email us
ABYC offers the following summary of their reason for existence on their website:"American Boat & Yacht Council, Inc. (ABYC) develops the vo...
Allowable Amperage in Conductors - Wire Sizing Chart
ABYC Ampacity Rating Table at 30°CFor bundles of 4 to 6 conductors multiply by 0.857 For bundles of 7 to 24 conductors multiply by 0.71...
Battery Management Wiring Schematics for Typical Applications
Batteries are at the heart of the electrical systems found on any boat or vehicle. Proper battery management, including switching and charg...
Conformité Européenne (CE)The CE mark is the official marking required by the European Community for products that will be sold, or put in...
Choose the Right ACR
Circular Mils Explained
What are Circular Mils? There are many different wire gauge systems used to specify electrical wire size. In North America the two most comm...
Full-scale Fuse Comparison (Scaled 1:1)
Hardware and Connectors for Traditional Metal Panels
Hardware and Wire Gauge for Custom 360 Panels
IP (Ingress Protection) Ratings
You may have noticed that some enclosed electrical components have an IP rating-for example, "IP67". Sometimes, a brief explanatio...
Protect Your Boat With The Correct Size Wire And Fuse - Wire Size Chart
Recommended Books on Marine Electrical Systems
Electrical systems can be difficult to understand. Incorrect installations can lead to nuisance trips, malfunction, dangerous heating, a...
#ABCDEFGHIJKLMNOPQRSTUVWXYZ NUMERIC 120V AC The line to neutral voltage in a single phase three wire AC system as commonly found in the ...
UL Designations Explained
Underwriters Laboratories Inc. (UL) is an independent, not-for-profit product safety testing and certification organization. The government...
UL Marine Listed, Battery Switch Testing
Underwriters Laboratory (UL) is the leading independent organization responsible for setting safety standards and testing electrical compone...
United States Coast Guard Requirements for Recreational Boats
Recreational Vessels Electrical RequirementsBy Captain Tony Ford USCG (Ret.) Note: This paper is a summary of the Coast Guard regulations fo...
USCG Vessel Inspections Program
The United States Coast GuardWhat Vessels are Subject to USCG Inspections We are all familiar with the Coast Guard in their search and rescu...
Voltage Drop in Conductor - Wire Sizing Chart
Calculate the maximum sustained amperage of the circuit. Measure the length of the circuit from the power source to the load and back. Deci...
Subscribe to Newsletter
Our Product Guarantee
Do Not Sell My Personal Info
California Transparency Supply Chain Act
Supplier Code of Conduct
©2006-2020 Blue Sea Systems
Phone: 360.738.8230 - Fax: 360.734.4195
Customer Service: Toll Free 800.222.7617 United States and Canada
Email: firstname.lastname@example.org - Internet: www.bluesea.com
Blue Sea Systems
4600 Ryzex Way
Bellingham, WA 98226 USA
©2006-2020 Blue Sea Systems
You have cookies disabled.
— Bluesea.com requires cookies to provide you full functionality. Many features of the site will not function until cookies are enabled. —
You are using an outdated browser.
— Bluesea.com can not guarantee 100% compatability with your browser —
Upgrade your browser