ICM Controls ICM518 Whole House Surge Protector, Type 1/2 SPD, 120/240V Split-Phase, NEMA 4X Indoor/Outdoor, UL 1449 Listed, Made in USA

Whole-home surge protection for 120/240V split-phase electrical systems. The ICM518 is a UL 1449 listed Surge Protective Device you can install at the service entrance (Type 1) or as a panel-mounted protector (Type 2). A rugged NEMA 4X enclosure supports indoor or outdoor mounting, while thermally fused MOV technology and an easy 3-wire hookup make protection straightforward and reliable. A green status LED provides at-a-glance confirmation that protection is active. :contentReference[oaicite:0]{index=0} Type 1 or Type 2 SPD: Works before or after the main disconnect to help safeguard HVAC, appliances, and home electronics from voltage spikes. :contentReference[oaicite:1]{index=1}Built for split-phase homes: Compatible with 120/240V single-phase panels commonly used in North America. :contentReference[oaicite:2]{index=2}NEMA 4X enclosure: Watertight and corrosion resistant for reliable indoor or outdoor installation. :contentReference[oaicite:3]{index=3}Easy installation: Hot-hot-ground leads and a 3/4 in. threaded conduit hub support a clean, code-friendly mount. :contentReference[oaicite:4]{index=4}LED status indicator: Green “protection when lit” light confirms the device is operational. :contentReference[oaicite:5]{index=5}Tested performance: VPR 1200V L-L and 700V L-N; MCOV 300VAC L-L and 150VAC L-N; Nominal discharge current (In) 20kA; SCCR 200kA; Max surge current 100kA. :contentReference[oaicite:6]{index=6}Compact footprint: Approx. 4.30 x 4.10 x 2.30 inches; about 1.10 lb for flexible placement near the panel. :contentReference[oaicite:7]{index=7}Installation notes: Mount using the 3/4 in. hub, keep leads as short and straight as possible, and follow local code. For Type 2 installs, connect to a properly sized 2-pole breaker. Professional installation is recommended. :contentReference[oaicite:8]{index=8}What’s included: ICM518 SPD with pre-attached leads and integrated 3/4 in. hub. See the specification sheet and installation guide for wiring diagrams and additional details. :contentReference[oaicite:9]{index=9}Ideal applications: Whole-home electrical panels, HVAC equipment, well pumps, kitchen and laundry appliances, entertainment and office electronics. :contentReference[oaicite:10]{index=10}Keywords: whole house surge protector, Type 1 SPD, Type 2 SPD, 120/240V split-phase, NEMA 4X, UL 1449.

• ⚡𝗪𝗵𝗼𝗹𝗲-𝗵𝗼𝗺𝗲 𝘀𝘂𝗿𝗴𝗲 𝗽𝗿𝗼𝘁𝗲𝗰𝘁𝗶𝗼𝗻: Type 1 or Type 2 SPD for 120/240 V split-phase panels that helps protect HVAC, appliances, and electronics from damaging voltage spikes.
• ⚡𝗦𝗶𝗻𝗴𝗹𝗲-𝗽𝗵𝗮𝘀𝗲 𝟭𝟮𝟬/𝟮𝟰𝟬 𝗩 𝗰𝗼𝗺𝗽𝗮𝘁𝗶𝗯𝗶𝗹𝗶𝘁𝘆: Suitable for main service entrance or downstream subpanels in typical North American homes.
• ⚡𝗡𝗘𝗠𝗔 𝗧𝘆𝗽𝗲 𝟰𝗫 𝗲𝗻𝗰𝗹𝗼𝘀𝘂𝗿𝗲: Watertight, corrosion resistant housing for reliable indoor or outdoor installation.
• ⚡𝗦𝗶𝗺𝗽𝗹𝗲 𝟯-𝘄𝗶𝗿𝗲 𝗶𝗻𝘀𝘁𝗮𝗹𝗹𝗮𝘁𝗶𝗼𝗻: Hot-hot-ground leads make hookup straightforward with standard tools.
• ⚡𝟯/𝟰 𝗶𝗻. 𝗰𝗼𝗻𝗱𝘂𝗶𝘁 𝗰𝗼𝗻𝗻𝗲𝗰𝘁𝗶𝗼𝗻: Threaded hub supports a clean, code-friendly mount to panel or disconnect.
• ⚡𝗚𝗿𝗲𝗲𝗻 𝗟𝗘𝗗 𝘀𝘁𝗮𝘁𝘂𝘀 𝗶𝗻𝗱𝗶𝗰𝗮𝘁𝗼𝗿: At-a-glance confirmation that protection is active and the device is operational.
• ⚡𝗨𝗟 𝟭𝟰𝟰𝟵 𝗹𝗶𝘀𝘁𝗲𝗱 𝘀𝗮𝗳𝗲𝘁𝘆: Independently tested performance for use as a Type 1 or Type 2 surge protective device.