Splicing Cables and Wires
Like Duolingo, but for Splicing Cables and Wires. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
For the part of you with thirty open tabs that never became anything.
20 levels across 3 sections, about 40 minutes end to end, roughly 8 days at five minutes a day. It moves through Making Your First Connection, Professional Joint Techniques, and Insulation and Durability. It starts from scratch.
Free forever · No credit card · iPhone & Android

Key ideas in Splicing Cables and Wires
- The insulation should be removed without the blade touching the metal
- Wires must be physically intertwined to stay together
- Nicks create a weak point where the wire will eventually snap
- A loose twist will pull apart under tension
- Bending a nicked wire concentrates stress on the damaged spot
- The mechanical wrap is what holds the weight, not just the tape
- The consequence of damaging the metal core while stripping insulation
- The process of creating a mechanically sound twist
- More surface contact allows electricity to flow easily
- Small contact points create 'resistance' which generates heat
- Winding wires along each other maximizes the touch points
- A firm pull (tug test) reveals if the twist is actually locked
- If the wires slide at all during a pull, the splice is a failure
- Wire nut colors indicate the maximum and minimum wire volume they can safely hold
- Using a nut that is too small for the wire gauge prevents the spring from fully engaging
- The relationship between wire contact and heat
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives Splicing Cables and Wires the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
What is the secret to a splice that won't pull apart under pressure?
Get it right to open this lesson and 19 more in the app.
Where Splicing Cables and Wires takes you
Learn to create secure, safe, and professional electrical connections. This course covers everything from basic wire twisting to weatherproofing and soldering for permanent repairs.
- 1
Making Your First Connection
- Your First Wire Splice
- Securing with Wire Nuts
- 2
Professional Joint Techniques
- Creating Inline Joints
- Soldering for Permanent Bonds
- 3
Insulation and Durability
- Insulating for Safety
- Weatherproofing and Strain Relief
- Handling Data and Low-Voltage
3 sections · 7 units · 20 levels. Built to play, not to enroll.
You pick the voice
Splicing Cables and Wires is taught in the The Professor style: clear, structured, thorough. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
More Technology on Tomo
JavaScript: Making the Web Move
Go from writing your first line of code to building interactive, data-driven web applications. This mastery course covers the logic, the browser, and the engine that powers the modern internet.
Mastering the Flow: Practical Electronics
Move beyond simple batteries and bulbs to design circuits that solve real problems. Master the math of power, troubleshoot like a pro, and understand how modern gadgets actually think.
Ham Radio: Your First License
Get ready to pass your Technician Class exam and join the global community of amateur radio operators. Learn how to talk across town or into space using the right frequencies and rules.
Electronics and Coding with Raspberry Pi
Stop just reading about circuits and start building them. Learn to control the physical world with code, from blinking your first light to designing smart home gadgets.
VBA: Automate Your Excel Tasks
Stop doing the same manual tasks every day. Learn to record, write, and refine VBA macros to make Excel work for you while you focus on what matters.
Python Programming for Beginners
Stop reading about code and start writing it. Build your first programs immediately and learn how to think like a developer to solve real-world problems.
Start Splicing Cables and Wires today.
Download Tomo, search Splicing Cables and Wires, and play your first lesson in under a minute.