1
1: The 3M Scotchlok 905 connector is sized for 18-14
AWG solid or stranded wire in the through “run” fitting and
22-18 AWG solid or stranded wire in the “tap” position.
No insulation stripping is necessary.
IDCs, when handled correctly, can save some upside-down sol-
dering under the layout. They provide a long-lasting connection
when used with correctly sized wire. The connectors come in a
couple of sizes and are color-coded. Knock-off copies of the 3M
product are also sold, but reports vary as to their reliability.
The “run and tap” connectors commonly used for model rail-
road power supply wiring have a channel for each size of wire.
You don't need to strip away the insulation. The connector wraps
around the larger wire (“run”). The smaller gauge pushes into
a stub connector at the top (“tap”). The connection is made by
folding over the connector lid and clamping it with special pli-
ers, or with lineman's or slip-joint pliers (2). The special tool and
connectors are available fromMicro-Mark, from electrical supply
houses, and from some big box home improvement stores.
Here's the 3M product page:
