Peco SL-E389 N Scale Code 80 Large Radius Left-Hand Electrofrog Turnout

The PECO SL-E389 is a Streamline N-gauge, Code 80, large-radius left-hand Electrofrog turnout. Its exact store item number is PCOSL-E389. PECO lists a length of 160 mm, a radius of 914 mm, and a turnout angle of 8 degrees. This guide explains how those dimensions affect track planning, how to confirm that the route branches to the correct side, and why an Electrofrog turnout deserves a wiring check before it is connected to an established layout.

Confirm the exact turnout

PECO’s current product page identifies the item as SLE389, gauge N, Code 80, large-radius, left-hand, Electrofrog. The Muncle Mikes catalog uses the expanded title Peco SL-E389 N Scale Code 80 Large Radius Left-Hand Electrofrog Turnout and item number PCOSL-E389. Keep those identifiers together when drawing a plan or comparing a product photo. PECO also lists a similarly named SL389 Insulfrog version; the “E” in SL-E389 is an important part of the item number.

PECO states that the Streamline N Code 80 system is compatible with all makes of N-gauge trains and with PECO Setrack. That is a track-system statement, not a guarantee that every layout arrangement will have the required clearance, wiring, or approach geometry. Confirm that the adjoining track is Code 80 or that a suitable transition is planned. Code and gauge answer different questions: N-gauge describes the model size, while Code 80 identifies the rail profile.

Read the geometry before drawing the route

The manufacturer’s published measurements are 160 mm length, 914 mm radius, and 8-degree angle. “Left-hand” describes the direction of the diverging route when viewed from the turnout’s intended approach. Place the turnout in the plan with the same orientation as the product drawing so the siding or branch goes where intended. A mirrored track plan can reverse the route, so do a physical mock-up before cutting roadbed or fastening track.

A 914 mm radius can help compare the curve with the space available, but it does not by itself tell you how much room is needed for every adjoining section. Use PECO’s plan sheet or the turnout itself to trace the diverging alignment. Check that the straight and curved connections reach their next pieces without forcing the rail sideways. Leave access to the point blades and the underside of the turnout, especially if wiring or a point motor will be installed later.

PECO notes that two of these turnouts and one SL394 long crossing can form a double junction. This is a manufacturer-supported arrangement, but it still needs a measured plan to confirm the crossing and track centers fit your board. Mark the centerlines on paper and compare them to the actual components before building a complex junction.

Electrofrog planning and wiring

Electrofrog refers to a live-frog turnout design. PECO directs users to its wiring publications for more details on Electrofrog turnouts. Follow those current instructions for the exact turnout and the control system in use. The route’s electrical behavior and any switching arrangement should be determined before the track is permanently fixed; do not assume the wiring is identical to an Insulfrog turnout just because the rail gauge and code match.

Before connecting power, review the layout’s wiring plan and identify the turnout’s feed, route isolation, and switching method according to the manufacturer’s directions. If you are unsure, test the section on an isolated work surface or consult an experienced modeler before integrating it into a powered circuit. A short circuit can result from track wiring that is not compatible with the live frog. This article avoids prescribing a wiring method because PECO’s instructions and the layout’s control arrangement govern the correct setup.

Dry-fit and test the turnout

Lay the turnout and adjoining sections on the baseboard without adhesive. Check the 160 mm straight footprint, the 914 mm diverging radius, and the direction of the left-hand branch. Make sure the route does not crowd a platform, support, tunnel portal, or another turnout. N scale uses small clearances, so check the body swing of the longest rolling stock you intend to run, rather than judging only from the track centerline.

Once track is aligned, test both routes at low speed with locomotives and cars that represent your roster. Observe wheel tracking through the points, couplers on the diverging path, and operation in both directions. If a vehicle hesitates, check rail alignment, point contact, and electrical continuity against PECO guidance before changing the track geometry. Keep the turnout accessible until the basic operation has been confirmed.

Buyer checklist

• Match PECO SL-E389 and store item number PCOSL-E389.
• Confirm N gauge, Code 80, large radius, left-hand route, and Electrofrog.
• Use 160 mm, 914 mm, and 8° measurements in the track plan.
• Check adjacent track code and the route direction before fastening.
• Follow PECO’s current Electrofrog wiring instructions before powering the section.

See the exact PECO SL-E389 turnout listing and find related layout help in the Muncle Mikes model train guides.