What size ring connector is needed to attach wire to terminals?

They are #8 as described in the description. Hard to find #8 rings in heat shrink connectors. #10 worked just fine for the terms and it seems all manufacturers sell this size.

Can I run +/- from batt to 100 amp breaker then +/- to fuse box so I can kill power to fuse box?

Yes you can. The fuse box will be powered off breaker. I used a toggle switch panel instead of a main breaker.

Product page says this can handle 100 amps per block, does that mean 100 amps on the left 6, and another 100 on the right?

No, it means 100a peak draw for the entire block...30a peak per circuit. The main positive in should be fused at 125 per the specs from BlueSea.

Does this block come with a positive and a negative bus? I don't want to have to daisy chain the positive lead to each lead on the panel...

Yes, it does indeed come with both a positive (fused) bus and a negative bus. Very nice unit, as with all Blue Sea products. I would and have bought again after purchasing mine.

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Blue Sea Systems ST Blade Fuse Block

Product ID: 249495008

Details

Connector type
Screw
Current rating
100 Amps
Material
Tinned Copper
Mounting type
screw mount
Number of contacts
12

⚡100A max block current rating

🔋12 circuits for versatile power management

🔧#10-32 stud for secure positive bus connection

£83.20

Duties & taxes included

In stock

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Description

⚡ Power up your projects with pro-grade fuse control!

12 CIRCUIT POWER HUB - Manage multiple circuits with ease and precision.
MARINE GRADE DURABILITY - Built to withstand vibration, heat, and moisture for any environment.
PUSH BUTTON LATCH ACCESS - Effortless fuse access with ABYC/USCG-compliant insulation.
TRANSPARENT PROTECTIVE COVER - Quick visual fuse inspection without removing the cover.
UNIVERSAL FUSE COMPATIBILITY - Accepts ATO and ATC fast-acting blade fuses for flexible use.

The Blue Sea Systems ST Blade Fuse Block 5026 is a robust 12-circuit fuse block designed for professional-grade electrical systems in RVs, boats, trucks, and solar setups. Featuring a 100-amp max block rating, marine-grade tinned copper construction, and a transparent, easy-access cover that meets ABYC/USCG standards, it ensures reliable, organized, and safe power distribution. Trusted by thousands with a 4.8-star rating, it’s the go-to choice for clean, durable, and efficient fuse management.

Specifications

ASIN	B001P6FTHC
Best Sellers Rank	#12,411 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #29 in Fuses & Holders
Brand Name	Blue Sea Systems
Color	With cover
Connector Type	Screw
Current Rating	100 Amps
Customer Reviews	4.8 4.8 out of 5 stars (6,619)
Global Trade Identification Number	00632085050269
Included Components	FUSE BLOCK ST BLADE 12 W/GRD/CVR
Item Dimensions W x H	8.4W x 16.4H centimeters
Item Type Name	FUSE BLOCK ST BLADE 12 W/GRD/CVR
Item Weight	0.1 Kilograms
Manufacturer	BLUE SEA
Material Type	Tinned Copper
Model	5026
Mounting Type	screw mount
Number Of Contacts	12
Number Of Poles	12
Number of Items	1
Number of Packs	1
Number of Positions	12
Part Number	5026-BSS
Specification Met	ISO 8846, SAE J1171
Temperature Range	5E+1 Degrees Celsius
UPC	632085050269
Unit Count	1 Count
Upper Temperature Rating	122 Degrees Fahrenheit
Voltage	12 Volts (DC)

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Smooth transaction and product arrived in perfect condition.

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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