Klein Tools Wire Marker Book 1...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$69.54
$33.00
Klein Tools 56251 Wire Marker Book, 120/240V 3 Phase 1-48

Klein Tools Wire Marker Book 120/240V 3-Phase Numbers 1-48 with Strong Tack Adhesive

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Model: 56251
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$69.54
$33.00
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Klein Tools Wire Marker Book 120/240V 3-Phase Numbers 1-48 with Strong Tack Adhesive

Professional wire identification system for 3-phase electrical installations

Klein Tools delivers professional-grade wire marking solutions with this comprehensive Wire Marker Book designed specifically for 120/240V 3-phase electrical systems. This 14-page book features numbers 1-48 printed in standard 3-phase colors (black, red, and blue) on durable vinyl coated white cloth material with strong tack adhesive for lasting adhesion even on oily wires.

Professional Features & Benefits

  • 3-Phase Color Coding: Numbers printed in black, red, and blue phase colors ensure proper electrical identification and code compliance
  • Strong Tack Adhesive: Maintains lasting adhesion on oily wires and challenging surfaces for reliable long-term marking
  • Vinyl Coated White Cloth Material: 8 mils thick construction provides durability and resistance to wear in demanding electrical environments
  • Large Print Design: 0.25-inch x 1.5-inch labels with easy-to-read print improve visibility and reduce installation errors
  • Perforated Pages: Each page can be detached as one-third, two-thirds, or entire page for flexible use and efficient workflow
  • Split Label Design: Labels can be easily split for application on thin wire while maintaining adhesion strength
  • Optimized Number Distribution: More pages of frequently used low numbers (1-24) reduce waste and improve job efficiency

Technical Specifications

  • Color: Black, Blue, Red Printed on White
  • Department: Electrical
  • Depth: 5.2000 in
  • Height: 0.1500 in
  • Material: Vinyl Coated White Cloth
  • Number Of Pages: 14
  • Overall Height: 0.125" (0.3 cm)
  • Overall Length: 5.5" (14 cm)
  • Overall Width: 3.328" (8.5 cm)
  • Product Details: Strong Tack Adhesive
  • Product Group: Jobsite Essentials
  • Product Subgroup: Comfort & Accessories
  • Product Type: Strong Tack Adhesive
  • Weight: 0.1300 lbs
  • Width: 3.2000 in

Professional Applications

  • Commercial Electrical Panel Marking
  • Industrial Control Cabinet Identification
  • Residential Service Panel Organization
  • Multi-Unit Property Electrical Systems
  • Professional Electrical Contractor Projects
  • Maintenance and Retrofit Applications
  • Code Compliance Documentation

Why Choose Klein Tools Quality?

Klein Tools delivers professional reliability with this wire marker book featuring strong tack adhesive technology and durable vinyl coated white cloth construction. The compact 0.13 lbs design and organized page system provide efficient workflow solutions for electrical professionals requiring dependable wire identification systems.

Manufacturer Resources

Spec Sheet

Product Specs

Number Of Pages:
14
Overall Height:
0.125" (0.3 cm)
Overall Length:
5.5" (14 cm)
Overall Width:
3.328" (8.5 cm)
Department:
Electrical
Product Group:
Cable Management & Identification
Product Subgroup:
Wire Markers & Labels
Product Type:
Wire Marker Book
Product Details:
Strong Tack Adhesive
Product Color:
Black, Blue, Red Printed on White
Product Height:
0.1500 in
Product Material:
Vinyl Coated White Cloth
Product Weight:
0.1300 lbs
Product Width:
3.2000 in
Product Depth:
5.2000 in
Country Of Origin:
United States

Klein Tools 56251 – Frequently Asked Questions

1) Will Klein 56251 wire markers stick to oily or dirty wire in a panel?
That is what the strong tack adhesive on the Klein Tools 56251 marker book is for. Klein states it holds on oily wires and other challenging surfaces, so it suits service panels and control cabinets where conductors have pulling lube or grime on them. The carrier is vinyl coated white cloth, so it wraps a round conductor rather than cracking like a flat paper tag.
2) What numbers and colors come in the Klein Tools 56251 wire marker book?
Numbers 1 through 48, printed in black, red and blue on white, which are the standard phase colors for a 120/240V 3-phase system. The book runs 14 pages, and Klein weights it toward the low numbers (1-24) because those get used most on a typical circuit run, so you are not throwing away half a book to get the numbers you need.
3) Is this the right Klein marker book for a single phase 120/240V residential panel?
The 56251 is set up for 3-phase work: the numbers are printed in black, red and blue phase colors. On a single phase 120/240 panel you would only be using the black and red sets, so you pay for blue you will not touch. It still works fine for residential service panel numbering if you want one book that covers both, but for strictly single phase jobs a single phase marker book is the closer match.
4) Are these wire markers too big for small gauge control wire?
Each label is 0.25 inch by 1.5 inch, and the design lets you split a label lengthwise so a narrower strip goes onto thin wire while still holding. For heavier conductors use the full label and wrap it. That split feature is the reason this book works on both panel feeders and control cabinet wiring.
5) Is the Klein 56251 book small enough to carry in a pouch or shirt pocket?
Yes. It measures 5.5 inches long by 3.328 inches wide and only 0.125 inch thick, and weighs 0.13 lbs, so it drops into a shirt pocket or a tool pouch without bulk. Pages are perforated in thirds, so you can tear off a third, two-thirds, or a whole page and leave the rest of the book in the van.
6) How durable is the label once it is on the wire in a hot or dirty environment?
The stock is vinyl coated white cloth at 8 mils thick, which is what gives it abrasion and wear resistance in panels and control cabinets rather than tearing when a conductor is pulled or re-dressed. The vinyl coat also keeps the printed number legible after handling.
7) What is the Klein part number for the 3-phase 1-48 wire marker book?
Klein Tools 56251. One model, no size or color options to specify, and it ships as the 14-page book with numbers 1 through 48.
How fast can I get the Klein Tools 56251 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Klein Tools 56251 come with a warranty?
Absolutely. The Klein Tools 56251 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Klein Tools 56251?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Klein Tools 56251 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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