3M 7000031501 3M™ ScotchCode™ Wire Marker Write-On Dispenser with Tape and Pen SWD, 0.75 in x 1.375 in, 10/Case

The SWD write-on marker tape is sized for cable with an outside diameter from 0.09 in up to 0.145 in of insulation, with a stated cable diameter range of 2,3 to 7,8 mm and a maximum outside diameter of 7.9 mm. That covers typical branch-circuit conductors. Anything fatter than about 7.9 mm OD will not wrap and self-laminate properly, so for larger feeders you want a longer marker tape.

No separate pen needed. Each dispenser ships filled with SWD tape plus one SMP permanent marking pen, and the case contains 10 dispensers. Each roll holds 50 labels, so a full case gives you 500 markers.

The SWD marker carries a maximum recommended voltage rating of 600 V, which covers standard commercial branch circuits and feeders. Temperature is the limit to watch: maximum operating temperature is 120 F (49 C), so keep it off conductors or surfaces that run hotter than that.

Each marker measures 0.75 in x 1.375 in overall, but only 0.75 in x 0.312 in (19.1 x 7.9 mm) of that is the write-on area. The rest is the clear self-laminating tail that wraps over your writing to protect it. Plan on short circuit numbers or panel/breaker designations rather than long descriptions.

Write-on is the right call when the legend is job-specific and you do not know it until you are at the panel: circuit numbers that change, device tags, tenant IDs, fiber drops. The SWD dispenser lets you letter it on site with the included permanent pen and then fold the clear laminating tail over the writing so it survives handling. Preprinted number books are better when you are repeating standard 1-through-45 conductor numbering in volume and want consistency without hand lettering.

It's refillable. When the 50-label roll runs out, the dispenser takes a replacement roll rather than being discarded, and 3M indicates refill rolls with an -R suffix on the part number. Order the SWD refill roll to match the SWD tape the dispenser ships with.

Yes, 3M lists the SWD write-on dispenser as a solution for access network work including FTTH, FTTB and CATV. The controlling factor is cable diameter, not signal type: the marker suits cable from 2,3 to 7,8 mm OD, which fits most drop cable and jacketed low-voltage runs.

The tape uses an acrylic adhesive, and the wrap is self-laminating: the clear section bonds to itself over the written area, so the marker is held by the full wrap rather than adhesive alone at one point. Clean and dry the insulation before applying for best bond.

The SWD wire marker dispenser is RoHS 2011/65/EU compliant without exemption, and country of origin is the United States. That covers the two items institutional and government procurement usually needs on a submittal for a marking product.

The label stock is white with white legend area, so hand-lettering in black permanent ink from the included SMP pen reads clearly against it. The dispenser body itself is white plastic.