ESCO LPT30 & LPT50BRD RV Transfer Switch Parts Guide

ESCO (Elkhart Supply) makes both the LPT30, a 30A 120V automatic transfer switch, and the LPT50BRD, a 50A 120/240V relay-based model. They select between shore and generator power, but their hot-leg count, terminal arrangement and internal components differ. This guide compares the models and links to their exact-number parts.

How LPT30 and LPT50BRD distribute AC power

A transfer switch selects one AC supply for the RV distribution panel; it does not combine shore power with generator output. The 30A and 50A arrangements below represent different electrical services.

LPT30 · 30A, 120V

Shore AC / generator ACTwo selectable sources, one hot leg each
30A DPDT transfer assemblySwitches hot and neutral; generator-priority delay
30A RV AC panelSingle 120V line plus neutral and equipment ground

LPT50BRD · 50A, 120/240V

Shore AC / generator ACTwo hot legs, neutral and equipment ground
50A relay-based transferTransfers two hot poles and neutral
50A RV AC distributionTwo hot legs, 120/240V service where configured
Original functional overview, not a terminal-position diagram or electrical installation drawing. Select only one approved AC source at a time and use the correct factory diagram for the specific enclosure.

Compare the two Elkhart transfer switch models

Model Store SKU Service current AC voltage Transfer design Model details
LPT30 19-2845 30A 120V, one hot leg DPDT switching of hot and neutral 6 × 6 × 3 in
LPT50BRD 19-2848 50A per hot leg 120/240V, two hot legs Relay-based transfer of two hots and neutral Enclosure versions differ

The LPT30 manufacturer specification covers one 30A/120V phase and lists a nominal 30-second generator delay. The LPT50BRD supports two hot poles and a switched neutral for 50A 120/240V service. Its DC relay design and neutral-relay interlock are different from the smaller switch.

Important model distinction: LPT30 and LPT30BRD are separately documented manufacturer models. Do not apply a BRD schematic to an LPT30 without confirming the exact printed model and cover diagram.

Find the labelled source and load terminals

The LPT50BRD factory literature includes both 8 × 8 × 4-inch and 8 × 11 × 3-inch enclosure versions. Their internal layouts are different. On the 8 × 8 × 4 version, the manufacturer's nine-terminal reference groups the functions below:

8 × 8 × 4 version Terminal group Factory-labelled function
1–3 SHORELINE Hot one, hot two and neutral
4–6 GENERATOR Hot one, hot two and neutral
7–9 LOAD PANEL Hot one, hot two and neutral

These numbers identify the 8 × 8 × 4 LPT50BRD revision only. They must not be copied to a different enclosure or used as an installation procedure. Match the actual lid diagram and current manufacturer manual. For LPT30, use its own model-specific drawing.

View LPT30 and LPT50BRD product photos

The cards below link to the exact catalog part numbers, not interchangeable substitute switches.

Original ESCO wiring and repair references

ESCO provides factory diagrams for LPT30, LPT30BRD and two separate LPT50BRD enclosure versions. Open the correct source drawing to confirm physical terminal positions, relay components and generator timer details.

ESCO LPT diagrams and model documents · LPT30 manufacturer specifications · LPT50BRD manufacturer specifications

LPT50BRD 8 × 8 × 4 drawing (PDF) · LPT50BRD 8 × 11 × 3 drawing (PDF)

Electrical service: Disconnect and verify isolation of shore, generator and inverter supplies before any work. These are mains-voltage components. Installation and terminal connections should be completed by a qualified RV electrician using the exact factory diagram.

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