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25 votes

How to Connect Modems to Wall?

That's a keyhole slot for a screw. It's not specific to a modem (though I'll keep using the word here). In this case it's actually a double keyhole. The idea is that you put a screw into the wall with ...
Chris H's user avatar
  • 6,700
24 votes

What type of connector is this, and how do I remove it?

That right there is a crimp connector. Few ways to remove one, mostly you want to avoid damaging wire and losing length. It's a compressed ring. First thing I'd try is side cutters. Cut between the ...
K H's user avatar
  • 2,288
18 votes
Accepted

Help in identifying a mystery wall socket

Thanks for providing the "opened" picture, which clearly reveals that this is 300 ohm TV (and/or FM radio) antenna twinlead. Not quite as obsolete as a buggywhip, but pretty close.
Ecnerwal's user avatar
  • 218k
17 votes
Accepted

Can I re-terminate this ISDN connector to an RJ45 connector?

Just off-hand, that looks like Cat 3 to me. That was likely an old ISDN BRI circuit (2 concurrent phone lines or one datastream at 128 Kb/s if you bound them). That said, you could probably re-...
Chris O's user avatar
  • 6,795
16 votes

What is this low power connector on my intercom wires?

Those are telephone splice connectors. You slide both wires in and press the button, which joins 2-4 wires electrically. They are often filled with a water-repellent goo, so they work outside as ...
gbronner's user avatar
  • 5,678
13 votes

Can I re-terminate this ISDN connector to an RJ45 connector?

One reason that you were limited to 100Mbps is that each jack only has two pairs (4 wires) connected. Gigabit requires all four pairs. As for if it will support Gigabit, unless you can find markings ...
DoxyLover's user avatar
  • 12.7k
13 votes
Accepted

Wago (221 or 222) vs Lever Nuts (generic/various Chinese brands)

All electrical devices used in America must be listed/tested by one of a few orgs, like UL/ETL/CSA. Quite a few Chinese products are not tested and not legal for use, the CE label is not recognized in ...
crip659's user avatar
  • 25.1k
13 votes

Joining 2 flexible plastic tubes

The correct way to fix this is with a barbed hose coupler fitting that looks something like this: Picture Source You want to get the size that will fit snugly inside the existing plastic / vinyl ...
Michael Karas's user avatar
  • 65k
13 votes
Accepted

Does the NEC allow chaining wire connectors within a single junction box?

I'm pretty sure that's OK, subject only to box fill issues. However, you have a beautiful METAL box! You don't need to do this! See my long list of metal box advantages, #8 and #9. At least one ...
manassehkatz-Moving 2 Codidact's user avatar
12 votes

How do I remove this connector from a solid electrical wire?

These don't get "removed", they get cut off. Snip the copper solid wire at the end of those connectors, strip off the insulation and then use wire nuts or some other approved connector to ...
JACK's user avatar
  • 81.8k
11 votes
Accepted

How to properly rewire these splices?

These "warm" junctions don't account for 135 watts. I suspect one junction with ~100 watts of heat emission, and I expect you'll see thermal damage there. Aluminum wiring combines very poorly with ...
Harper - Reinstate Monica's user avatar
10 votes

Why don't 12-10 AWG terminal connectors fit 10 AWG PV wire?

PV wires use fatter insulation As you have found out the hard way, PV wire uses much thicker insulation than ordinary THHN building wires, so it won't fit into ordinary insulated-type crimp terminals. ...
ThreePhaseEel's user avatar
10 votes
Accepted

Why don't 12-10 AWG terminal connectors fit 10 AWG PV wire?

I resolved this issue and am posting what I found. Comments and answer so far were in the right direction, thanks. The first bit of feedback I got was the shave down the insulation on the PV wire, to ...
cr0's user avatar
  • 1,375
9 votes
Accepted

How to Connect Modems to Wall?

This really shouldn't be an answer since Chris H.'s answer nailed it (and should be accepted), but I want to address several comments from several answers, and this is far too long for a comment on ...
FreeMan's user avatar
  • 47.4k
9 votes
Accepted

Push-in splice - What is this model?

That appears to be an early version of the product IdealĀ® currently calls In-Sure Push In (in English, anyway) and the current 88/87 model numbers suggest that 85 is a plausible model number. Or ...
Ecnerwal's user avatar
  • 218k
8 votes
Accepted

Why am I getting noise with my network cable connectors?

Pin 6 is not crimped. Your crimp die is defective or you need to try again. All the pins should be at the same level. But really, punch-down into jacks and buy patch cables as already suggested. ...
Ecnerwal's user avatar
  • 218k
8 votes
Accepted

Cable With Same Plug And Slot (RJ11), What's The Purpose?

That looks like a DSL filter. DSL "piggybacks" on a regular voice line. The DSL modem will automatically block out voice frequencies. DSL filters are used on all connections EXCEPT the DSL modem to ...
manassehkatz-Moving 2 Codidact's user avatar
8 votes
Accepted

How many wires can safely be secured in a Marrette 33 wire nut?

Here is a catalog from Thomas & Betts, the makers of Marrette connectors. Pages 14-15 cover the black high-temperature wire nuts including the Model 33. The graph on Page 15 shows limits of "Min....
hobbs's user avatar
  • 206
8 votes

How many wires can safely be secured in a Marrette 33 wire nut?

Don't reuse old nuts, or ones of indeterminate origin. Some wire-nuts are single-use; using them destroys their gripping power. Wire-nut technology has moved in leaps and bounds in the last 10-20 ...
Harper - Reinstate Monica's user avatar
8 votes

Polaris type electrical connectors terminology

Your wire is #8 AWG, copper since it's a 40 amp circuit. So you need a connector that will fit that wire. The sizing on the connectors states what wires will fit in the individual holes in the ...
JACK's user avatar
  • 81.8k
8 votes

Can I re-terminate this ISDN connector to an RJ45 connector?

The ordering of wires follows the T568B standard, so you might be able to get two breakout boards connected to jacks and simply replace the termination of the wires using the order that they are ...
gbronner's user avatar
  • 5,678
8 votes

Wago (221 or 222) vs Lever Nuts (generic/various Chinese brands)

Are they listed by a Nationally Recognized Testing Lab, (such as UL or ETL in the US) or will you be "self-importing" them from Amazon Marketplace or AliExpress or some other "cheaper ...
Ecnerwal's user avatar
  • 218k
8 votes

Wago (221 or 222) vs Lever Nuts (generic/various Chinese brands)

In general they aren't safe. Most of the electric installation stuff you find on Amazon-AliBaba et al. are from third party sellers. That means that while Amazon and other provides the selling-...
Martin's user avatar
  • 3,074
8 votes

Aluminum Splicer/Reducer for Connecting Thicker Aluminum and Copper Wires

You need a disconnect out at the outdoor unit. NEC isn't particular about what kind you use. If you want to use a pullout disconnect, hunky dory. A big knife switch disconnect, fine. A "2 ...
Harper - Reinstate Monica's user avatar
7 votes

Is this okay ? Meets the code requirements

Are you talking about this circled bit? If so, this looks fine. It's just used as nailing surface for drywall -- it's not structure. It kind of looks like someone made the bottom of it a bit short, ...
gregmac's user avatar
  • 29.1k
7 votes

Wago (221 or 222) vs Lever Nuts (generic/various Chinese brands)

I would stick with listed devices from trusted brands, from reputable distributors. Even if the risk is low, the "penalty for failure" can be steep. This is not an area I would be looking ...
user28910's user avatar
  • 546
7 votes

What electrical connection type is this?

I think it's a "rope light" connector. If you have a multimeter/voltmeter you should check if it's line voltage or low voltage. If low voltage there's a power supply somewhere between the ...
Ecnerwal's user avatar
  • 218k
7 votes
Accepted

What is this low power connector on my intercom wires?

These look like an insulation displacement connector. 3M makes a comparable item they call Scotchlok; several other connector makers also offer something comparable. The Scotchlok name is semi-...
Greg Hill's user avatar
  • 30.8k
6 votes

What brand are these pex threaded T connectors?

These are actualy "Qest" (pronounced "quest") brand fittings that were more popular 10-15 years ago (maybe further back). I remember in the early 2000's these were sold at Home Depot and Lowes back ...
JPhi1618's user avatar
  • 28k
6 votes
Accepted

How to handle 4 wires using 3-port AlumiConn connectors?

You have two options here You have two options here. Either you can daisy-chain AlumiConns as you describe, using 12AWG copper THHN for the jumper wire, or you can use a single Al/Cu rated mechanical ...
ThreePhaseEel's user avatar

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