Bad cable work causes a lot of service calls that get blamed on the provider. Pixelated TV, slow internet, dropped modem sync, and weak signal at one room often come down to the wrong cable, too many splitters, poor fittings, or no proper ground. If you’re asking, “How do I run cable to my tv, my router, my supplier? Which brand is best, rg 59 or rg 6?” the short answer is this: use RG6, keep the path simple, terminate it correctly, and make sure the incoming line is bonded and grounded where it enters the building.
This is one of those jobs that looks easy until you open a crawlspace or attic in an older home. In East Bay houses especially, you may find abandoned coax, phone wire mixed in with low-voltage cable, old splitters hidden in walls, or a cable route that crosses electrical equipment the wrong way. The good news is that coax runs are usually straightforward if you plan the route before you start.
How do I run cable to my TV, router, and supplier the right way?
Think of the system as one incoming feed from the provider, then a controlled split to the devices that need service. The provider’s cable should enter at one point, usually near the electric service or a structured wiring area. From there, the signal can go to a modem for internet, to TV boxes, or to both through a properly rated splitter.
The cleanest setup is a home run layout. That means each TV location and the modem location gets its own dedicated RG6 cable back to a central splitter location. You do not want a chain of random splices from room to room. Every extra connection costs signal strength, and every cheap barrel connector or old splitter adds one more failure point.
If the modem is the priority, give it the best path. In many homes, the incoming line should hit a grounding block first, then either go directly to the modem or through a high-quality splitter if television service also needs to be fed. Internet service is usually less forgiving than an older TV setup, so the modem line should be short, direct, and free of unnecessary splits.
Start with the cable path, not the cable brand
Before buying anything, decide where the cable enters, where the modem will live, where each TV is located, and how you will physically get from point A to point B. In a one-story home with attic access, the attic is often the easiest route. In homes with crawlspace access, underfloor routing may be better. In finished walls with no clear path, an exterior run in conduit can be cleaner than cutting a lot of drywall.
Keep coax away from obvious damage points. Do not pinch it under baseboard trim. Do not staple it tight enough to deform the jacket. Do not run it loose where it can be stepped on in an attic. Avoid sharp bends. Coax is not like lamp cord. If you kink it, performance drops.
Also keep low-voltage cable separate from line-voltage wiring where practical. Crossing an electrical cable at 90 degrees is generally fine. Running side by side for a long distance is not good practice, especially in crowded older wall cavities. Good cable routing is not just neat work. It makes troubleshooting possible later.
RG59 vs RG6: which is better?
For almost all modern residential cable TV and internet work, RG6 is the right choice. RG59 is smaller and was common years ago for older analog video uses, short jumpers, and some camera applications, but it has higher signal loss over distance and is usually the wrong choice for today’s provider-fed TV and broadband systems.
If you are choosing between RG59 and RG6 for your TV and router, use RG6. If you are doing a longer run, use RG6. If you are feeding a cable modem, use RG6. If you want the job done once and not revisited, use RG6.
There are a few cases where people still mention RG59. It can be more flexible and easier to work with in tight spaces, and some older legacy systems used it. But in real homes with modern service, those advantages do not outweigh the signal loss. In practical field terms, RG59 is yesterday’s cable for this application.
Which brand is best for RG6?
Brand matters less than cable rating, shielding, copper quality, and connector quality. A reputable RG6 from a known manufacturer is fine if it is swept to the right frequency range, made for in-wall use if you’re putting it in walls, and matched with proper compression fittings.
What you want is quad-shield or solid dual-shield RG6 from a dependable manufacturer, not bargain-bin cable with thin shielding and poor jacket quality. A lot of bad installs fail because someone bought cheap coax and then used twist-on ends. The connector is often the weak link. Use compression fittings made for the exact cable type. A good cable with a bad connector job is still a bad run.
If the cable is going outdoors, use outdoor-rated RG6. If it will be exposed to sunlight, make sure the jacket is UV-rated. If it goes underground, direct burial cable or conduit is the right move. Indoor white coax run across a roof edge or buried next to a walkway is not professional work and does not last.
Splitters, signal loss, and modem problems
This is where many DIY jobs go wrong. Every splitter introduces loss. A two-way splitter is usually manageable. A three-way or four-way splitter may still work, but now signal levels matter a lot more, especially for the modem.
If your provider line comes in and immediately hits a four-way splitter feeding three TVs and one modem, the modem may still sync, but it may not sync well. You can get intermittent internet drops, slow speeds, or poor upstream levels. When possible, keep the modem on the first split or use a layout that favors the modem path.
Use only splitters rated for the service frequencies in use. Old splitters left from previous owners are common troublemakers. So are signal amplifiers installed to patch over a bad layout. An amplifier can help in some designs, but it is not a substitute for correct cable routing and proper signal balancing.
Grounding matters more than most people think
The incoming coax from the provider should be bonded and grounded at the point of entry according to code and good installation practice. This helps protect equipment and helps equalize potential differences between systems. It is not the same thing as plugging the TV into a surge strip.
In older homes, especially where electrical service has been altered over the years, I often see low-voltage systems added with little regard for bonding and grounding. That is not just sloppy. It can create safety and equipment issues. If the cable entry is near an older service, a Federal Pacific panel, a Zinsco panel, or questionable grounding electrode work, that is a sign to look at the whole installation, not just the coax.
Practical installation tips that save headaches
Measure the route realistically, not in a straight line on paper. Add extra length for turns, service loops, and termination. Label both ends of each cable if you are running more than one. That seems basic until you are in a crawlspace looking at four identical lines.
Drill clean entry holes and use bushings or plates where needed. Seal exterior penetrations. Use proper clamps and supports, but do not crush the cable. If you are running to a wall plate, use a low-voltage bracket and terminate to a coax keystone or wall plate rather than pulling raw cable through drywall.
After termination, test the line before closing up any access or putting furniture back. At minimum, confirm continuity and service at the device. Better still, check actual modem performance and TV signal quality once the splitter layout is final.
When to call the provider and when to call an electrician
Call the provider if the drop from the pole or pedestal is damaged, if the service levels coming to the house are bad, or if the modem still shows poor signal after the inside wiring is corrected. The supplier owns part of that system, and some work is theirs to handle.
Call an electrician when the cable path requires drilling, fishing through difficult building spaces, routing near electrical equipment, installing conduit, correcting grounding and bonding issues, or sorting out a house where low-voltage and power work have been mixed together carelessly. In older homes, cable work often exposes bigger issues. That is common in Oakland and Berkeley houses where generations of additions and remodels left wiring surprises behind.
A veteran electrical contractor can also tell you when the problem is not the coax at all. I have seen homeowners chase TV and router issues that were really tied to poor receptacle grounding, unstable power to networking equipment, or service equipment problems.
The best answer for most homes
If you want the shortest correct answer, here it is. Bring the provider line to one entry point. Bond and ground it properly. Use a clean splitter layout with dedicated home runs. Put the modem on the best path. Use quality RG6, not RG59. Use compression fittings, not twist-ons. Keep the route protected, accessible, and neat.
That approach works in most houses, makes future troubleshooting easier, and avoids the common mistake of trying to save a few dollars on cable while creating years of signal problems. Good cable work is not fancy. It is just careful, code-aware, and done once the right way.
